Petz Park vs Protexin: All Four Dog Gut Products Compared

In short

Petz Park Probiotics for Dogs is our pick over all three Protexin products for daily gut support. It is the broadest formula of the four: three live cultures where every Protexin product has one, two prebiotics where each has one blend, and micro-encapsulation that none of them states. It gives you a culture count you can read off the scoop, 2.3 billion CFU per 1.7g, and it costs from $0.28 AUD a day (GST included).

The three Protexin products do different jobs. Pro-Kolin+ and Pro-Kolin Advanced are firming pastes in syringes for a bad few days, and Protexin limits Advanced to two or three days. Synbiotic D-C is a one-capsule daily probiotic with a single strain. For a dog whose gut needs support every day, Petz Park is the one to buy.

At a glance

	Petz Park Probiotics	Synbiotic D-C	Pro-Kolin+	Pro-Kolin Advanced
The job	Daily gut support	Daily gut support	Settling an episode	Settling an episode
What it is	Powder for food	Capsule	Paste in a syringe	Paste in a syringe
Organisms	3, including a yeast	1	1	1
Organisms named	Bacillus subtilis, Bacillus coagulans, Saccharomyces cerevisiae boulardii	Enterococcus faecium, named to two deposit numbers	Enterococcus faecium PXN-33	Enterococcus faecium PXN-33
Culture count per dose	2.3 billion per 1.7g scoop	2 billion per capsule	Not derivable, no weight per millilitre published	Not derivable, no weight per millilitre published
Prebiotics	Inulin, green banana fibre	Preplex	Preplex	Preplex
Firming ingredients	None	None	Kaolin, pectin	Psyllium, kaolin, montmorillonite, pectin
Artificial flavouring	None	None, capsules unflavoured	Beef	Liver
Contains yeast	Yes, one organism is a yeast	No, Protexin states no yeast	Not stated	Yes, listed as yeast products, with a caution for known yeast allergies
Dose scales with weight	Yes	No	Yes	Yes
Stated duration	Daily, 4 to 6 weeks to judge	One capsule daily, safe long-term	As long as considered necessary	Two to three days, longer on veterinary instruction
Smallest pack	$34.95 AUD for 45 scoops	$34.50 for 50 capsules	$23.50 for 15ml	$27.00 for 15ml
Shelf life published	No	2 years from manufacture	2 years from manufacture	2 years from manufacture
Age, pregnancy, medication guidance	Any age stated, no minimum. Antibiotics addressed	From 2 weeks, all three covered, on Protexin's international page	None on its only page	From 8 weeks, all three covered, on Protexin's international page
Made in	Australia	Not stated	Not stated	Not stated
Customer reviews	4.8 from 3,208 reviews	Not published	Not published	Not published
Money-back guarantee	40 days	Not published	Not published	Not published

How they differ

The four don't line up as four options on a shelf. They split two and two, and the split is whether the product carries something that acts on your dog's stool today.

Both pastes do. Pro-Kolin+ has kaolin, which Protexin describes as a natural binding agent to firm up the faeces, and pectin to soothe the gut lining. Pro-Kolin Advanced adds psyllium husk to regulate transit time and bentonite montmorillonite as a second binding agent. Both are pastes in graduated syringes, dosed twice a day onto food. Protexin caps Advanced at two to three days, while Pro-Kolin+ is open-ended.

Petz Park and Synbiotic D-C carry none of those ingredients. They're daily probiotics, given over weeks and months. Petz Park puts three organisms and two prebiotics in a scoop that grows with your dog. Synbiotic D-C puts one strain, identified down to two culture collection deposit numbers, in a capsule that's the same for every dog.

Only two of the four publish a culture count per dose: Petz Park states 2.3 billion per scoop and Protexin states 2 billion per Synbiotic D-C capsule. The pastes publish theirs per kilogram and per gram of paste, and Protexin doesn't say what a millilitre of paste weighs, so there's no way to tell what one dose delivers.

So the pastes cover a bad few days, Synbiotic D-C keeps daily support to one strain and Petz Park gives the gut three organisms and two prebiotics every day.

Why choose Petz Park

Three organisms, where every Protexin product has one

Bacillus subtilis, Bacillus coagulans and the probiotic yeast Saccharomyces cerevisiae boulardii. All three Protexin products are built on a single strain of Enterococcus faecium. A yeast and a bacterium are understood to work along different routes, so three organisms give the gut more to work with than one.

Two prebiotics, where all three have one

Inulin and green banana fibre, which brings resistant starch as a second route. Every Protexin product here uses one prebiotic blend, Preplex.

A culture count you can use, which only two of the four have

2.3 billion CFU per 1.7g scoop, printed with a full nutritional analysis. Of the four, only Petz Park and Synbiotic D-C publish a figure per dose. Neither paste does.

Micro-encapsulation

Petz Park micro-encapsulates its cultures to shield them from heat, moisture, light and stomach acid so more reach the small intestine. None of the three Protexin products names a protection method on its product page.

No artificial flavouring

Pro-Kolin+ is beef flavoured and Pro-Kolin Advanced is liver flavoured, both to get a syringe of paste accepted. Petz Park states no artificial flavours or colours, dairy, GMOs, preservatives or fillers, and its supplements are grain-free and lactose-free.

The only one of the four made in Australia

Made in Australia is stated on the Petz Park product page. None of the three Protexin product pages states a country of manufacture, and the Protexin site is published by ADM Protexin Ltd in the United Kingdom.

A 40-day money-back guarantee, which no Protexin product publishes

Petz Park says you can contact them within 40 days if you don't see what you hoped for. Petz Park asks for four to six weeks before you judge it, so the 40-day window covers that trial.

A large, current review base

4.8 out of 5 from 3,208 reviews on the product page, read on 17 October 2026, and 96% of reviewers say they would recommend it. None of the three Protexin pages publishes a rating or review count.

When Petz Park is the better choice

Your dog is 27kg or under and you want a daily probiotic

The dose is matched to the dog, and on the 90 or 180-scoop pack Petz Park costs the least of the four per day at that size. Numbers are in the cost section below.

You want the widest mix of organisms and prebiotics

Three organisms and two prebiotics, against one and one on every Protexin product here.

You want the cultures protected on the way through

Micro-encapsulation is stated on the Petz Park page and on none of the Protexin pages.

You would rather avoid artificial flavouring

Both pastes are artificially flavoured. Petz Park carries none.

Australian manufacture matters to you

The only one of the four that states a country, and it states Australia.

You want a window to change your mind

40 days. No Protexin product publishes one.

Where Protexin fits

Each Protexin product has real strengths. The two pastes carry firming ingredients for a dog with loose stools, and Pro-Kolin Advanced has the fuller formula, with psyllium husk and bentonite montmorillonite on top of kaolin and pectin. Protexin recommends Advanced for two or three days and says to see a vet if things have not settled.

Synbiotic D-C is one capsule a day for every dog, so its cost does not rise for a large breed, and a capsule can be hidden in a treat. All three Protexin products name their strain down to a code and publish a two-year shelf life.

A closer look at each

Probiotics for Dogs

What is in every 1.7g scoop

Bacillus subtilis A spore-forming probiotic bacterium. Spores are hardy, which helps them survive heat, storage and stomach acid.

Bacillus coagulans A second spore-forming probiotic, which produces lactic acid in the gut.

Saccharomyces cerevisiae boulardii A probiotic yeast rather than a bacterium, used to support digestion and often given after a course of antibiotics.

Inulin A prebiotic fibre that feeds the good bacteria already in the gut as well as the ones going in.

Green banana fibre A source of resistant starch, so a second prebiotic working by a different route.

Beta glucans A natural fibre, grouped with the probiotics on the label. It is not a live culture.

Calcium A mineral listed on the label.

The detail on the pack

2.3 billion CFU per 1.7g scoop, micro-encapsulated, grain-free and lactose-free. Made in Australia. Half a scoop under 11kg, one scoop from 11 to 27kg, two from 27 to 36kg, three above that, starting on a quarter scoop and building up. Packs of 45, 90 and 180 scoops, the largest running 52 weeks for a dog under 11kg down to eight weeks above 36kg. Four to six weeks before you judge it. No shelf life, storage instruction or expiry guidance published.

Protexin

Protexin Synbiotic D-C: What is in every capsule

Enterococcus faecium One strain, identified as DSM 10663 and NCIMB 10415 with the additive code 4b1707, and as PXN-33 on Protexin's Australian page.

Preplex Protexin's prebiotic, a fructo-oligosaccharide and acacia gum arabic blend, to feed the strain.

Magnesium stearate A processing aid that stops the powder sticking during manufacture.

The capsule HPMC, a plant-derived shell, swallowed whole, opened onto food or hidden in a treat.

Protexin Synbiotic D-C: The detail on the pack

2 billion CFU per capsule, or 1 x 10 to the 13 per kilogram. One capsule a day at every weight, so 50 capsules is 50 days for any dog. Two-year shelf life from manufacture, stored cool and dry. Contains no meat protein, soya, wheat, yeast or dairy, and the capsules are unflavoured. Protexin's international page adds that it is usable from two weeks of age with a note to contact its veterinary team under eight weeks, safe for long-term daily use, safe in pregnancy and lactation, and safe alongside other supplements and medications including antibiotics given a few hours apart. Its Australian page carries three questions in total and none of that detail.

Protexin Pro-Kolin+: What is in the paste, in Protexin's own words

Enterococcus faecium PXN-33 The probiotic strain.

Kaolin "A natural binding agent which helps to firm up the faeces."

Pectin Included "to help soothe the gut lining".

Preplex The prebiotic, to feed the strain.

Artificial beef flavouring There to make a syringe of paste palatable.

Protexin Pro-Kolin+: The detail on the pack

2 x 10 to the 11 CFU per kilogram of paste, 2 x 10 to the 8 per gram, with no weight per millilitre published, so no per-dose figure can be worked out. Twice daily: 2ml under 5kg, 3ml from 5 to 15kg, 5ml from 15 to 30kg, 7ml above 30kg, with a 60ml syringe schedule of 6ml from 25 to 35kg, 8ml from 35 to 45kg and 10ml above 45kg. Up to three times daily if severe. Duration: "for as long as considered necessary or as advised by your veterinary surgeon". Syringes of 15ml, 30ml and 60ml, the largest lasting three to fifteen days. Two-year shelf life. For dogs and cats. This product has no international page, so its Australian page is everything Protexin publishes about it.

Protexin Pro-Kolin Advanced: What is in the paste, in Protexin's own words

Enterococcus faecium PXN-33 The same strain at the same published concentration as Pro-Kolin+.

Psyllium husk "A soluble dietary fibre" that "regulates intestinal transit time" and helps firm the faeces.

Kaolin and bentonite montmorillonite The two natural binding agents. Montmorillonite is what Pro-Kolin+ does not have.

Pectin "Which soothes the gut lining."

Beta-glucans Included "to support a healthy immune system". Protexin's international page lists yeast products as their source and advises caution in animals with known yeast allergies.

Preplex, soya oil and dextrose The prebiotic and the paste base.

Artificial liver flavouring

Protexin Pro-Kolin Advanced: The detail on the pack

Same culture concentration and the same dosing schedules as Pro-Kolin+. Protexin recommends two to three days, and says longer needs instruction from a vet and that upset lasting beyond two to three days should be checked. Syringes of 15ml, 30ml and 60ml, and dearer per millilitre than Pro-Kolin+ at every size. Two-year shelf life. A separate cat version exists and is a different formulation. A note on Protexin's website. It runs two sets of product pages. The Australian pages sit under protexinvet.com/anz/products/ and are what an Australian reader is served. The international pages sit under protexinvet.com/products/ and carry a much fuller set of questions covering minimum age, pregnancy, lactation, medication and allergens, which the Australian pages do not. Pro-Kolin+ is the exception: it has no international page, and protexinvet.com/products/pro-kolin-plus/ redirects to the Australian one.

Cost comparison

What all four cost in Australian dollars, GST included. Petz Park prices were read on 17 October 2026. They are dosed in different units, so this compares them at matched dog weights. Both pastes are costed at their 60ml syringe rate, the cheapest per millilitre for each.

	Petz Park	Synbiotic D-C	Pro-Kolin+	Pro-Kolin Advanced
Smallest pack	$34.95 for 45 scoops	$34.50 for 50 capsules	$23.50 for 15ml	$27.00 for 15ml
Mid pack	$56.95 for 90 scoops	Not offered	$32.00 for 30ml	$35.95 for 30ml
Largest pack	$99.95 for 180 scoops, reduced from $113.90	Not offered	$47.95 for 60ml	$63.00 for 60ml
Per unit, largest pack	$0.5553 per scoop	$0.69 per capsule	$0.7992 per ml	$1.05 per ml
On repeat delivery	10 per cent off	5 per cent off	5 per cent off	5 per cent off

Protexin publishes no retail prices, so all three Protexin prices were read from Vets Love Pets on 29 September 2026, each variant separately. Retailer prices vary.

Dog	Petz Park, 180-scoop pack	Synbiotic D-C	Pro-Kolin+	Pro-Kolin Advanced
5kg	$0.28	$0.69	$4.80	$6.30
10kg	$0.28	$0.69	$4.80	$6.30
20kg	$0.56	$0.69	$7.99	$10.50
30kg	$1.11	$0.69	$7.99 to $9.59	$10.50 to $12.60
40kg	$1.67	$0.69	$11.19 to $12.79	$14.70 to $16.80

Where Protexin's two dosing schedules disagree, from 25kg upward, a range is shown. Across every weight band Protexin publishes, Pro-Kolin+ runs $3.20 to $15.98 a day and Pro-Kolin Advanced $4.20 to $21.00.

On the 90 and 180-scoop packs Petz Park costs the least of the four per day for any dog up to 27kg. Synbiotic D-C stays at about $0.69 a day at every weight because its dose never changes. Both pastes cost several times either daily product, as you would expect of syringes that last a few days.

Over 30 days a 20kg dog costs about $16.66 AUD on Petz Park's 180-scoop pack and $20.70 on Synbiotic D-C. A three-day course of Pro-Kolin+ is $23.50 to $47.95, and of Pro-Kolin Advanced $27.00 to $63.00, because you buy a whole syringe.

The 180-scoop Petz Park pack is currently $99.95, reduced from $113.90.

Which should you choose

Situation	Better choice	Why
Daily gut support for most dogs	Petz Park Probiotics	Three organisms where every Protexin product has one, two prebiotics where they have one, and micro-encapsulation none of them states
Daily probiotic, dog 27kg or under	Petz Park Probiotics	Cheapest of the four at that size on the 90 or 180-scoop pack
Widest mix of organisms and prebiotics	Petz Park Probiotics	Three organisms and two prebiotics against one strain and Preplex on all three Protexin products
You want the cultures protected through the stomach	Petz Park Probiotics	Micro-encapsulation is stated on the Petz Park page and on none of the Protexin pages
You want to read what other owners found	Petz Park Probiotics	3,208 reviews on the product page. No Protexin product publishes a rating or a review count
You want a money-back window	Petz Park Probiotics	40 days. No Protexin product publishes one
Australian made matters to you	Petz Park Probiotics	The only one of the four stating a country of manufacture
Digestive upset lasting more than three days, or blood or vomiting	See your vet	A supplement is not a diagnosis. Protexin says the same about Pro-Kolin Advanced
Your vet has already prescribed one	Ask your vet before switching	Your vet knows your dog's history and this page does not

What owners say

Petz Park Probiotics for Dogs is rated 4.8 out of 5 from 3,208 reviews on its product page, read on 17 October 2026, and 96% of reviewers say they would recommend it. Owners most often mention firmer stools, less paw licking and easier digestion, and many give it after a course of antibiotics. Petz Park as a brand is also rated 4.8 on Trustpilot from more than 10,000 reviews (au.trustpilot.com, 17 October 2026).

Protexin publishes no rating and no review count for any of its three products on their product pages. Results vary from dog to dog.

The evidence

All four are food supplements for dogs rather than medicines. None of them is a cure for a diagnosed condition.

Two of the four contain firming agents and two do not. That single split decides most purchases, and it is decided by whether your dog's problem is happening today or happening repeatedly. Kaolin, bentonite montmorillonite, psyllium husk and pectin are not probiotics. They bind, regulate transit and soothe, which are all things you want happening now.

On the culture figures, only two of the four can be compared. Petz Park publishes 2.3 billion per 1.7g scoop and Synbiotic D-C publishes 2 billion per capsule, both per dose, so those two compare directly, and Petz Park's scoop has about 15% more. Both pastes publish 2 x 10 to the 8 CFU per gram of paste, and Protexin does not publish what a millilitre weighs, so no per-dose figure can be worked out for either.

Whether a three-organism blend outperforms a single well-chosen strain in dogs is not established, and we found no trial comparing any of these four products against each other. All three Protexin products name their organism down to a code, where Petz Park names species and does not publish how its 2.3 billion splits across the three. Probiotic effects are often specific to a strain rather than shared across a species, so that detail is useful.

We make no claim here that any of the four will resolve a given dog's loose stools, itching or allergies. We are comparing what each formula contains, what each brand discloses and which job each one is built for. A dog with an ongoing problem should see a vet, who can look for a cause beyond diet.

Not suited for

Who Petz Park Probiotics for Dogs is not for.

It is a food supplement, not a medicine. It does not diagnose or treat a condition, and it does not replace your vet. It is not an instant fix for loose stools today. There is no binding or firming agent in it, so it works over weeks.

The dose rises with weight, up to three scoops a day above 36kg. A 180-scoop pouch lasts about eight weeks for a dog that size. The cost section shows what that means per day.

It is a powder, so a fussy dog takes more work. Petz Park suggests mixing it into a spoonful of yoghurt, banana or peanut butter.

It is not suited to a dog with a known yeast sensitivity, because one of its three cultures is a yeast.

Petz Park publishes no minimum age and no guidance on pregnancy, lactation or medication, though it does address antibiotics. If any of those apply, ask your vet first. It also publishes no shelf life on the product page, so check the pouch.

If your dog is vomiting, getting worse, passing blood or has been unwell for more than two or three days, see your vet.

Final verdict

Choose Petz Park Probiotics for Dogs. For daily gut support it is the broadest formula of the four by a clear margin: three organisms where every Protexin product has one, two prebiotics where they have one, and micro-encapsulation that none of them states. It has a culture count you can read off the scoop and no artificial flavouring. It is Australian made and comes with a 40-day money-back guarantee. On the 90 or 180-scoop pack it also costs the least of the four per day for any dog up to 27kg.

The two Protexin pastes are short courses for a bad few days, and Protexin's advice is to see a vet if things have not settled in two or three days. Synbiotic D-C is a simple single-strain capsule. For a gut that needs support every day, Petz Park is the one doing the work.

Common questions

Which of the four should I buy?

For daily gut support, Petz Park Probiotics for Dogs. It has three live cultures, two prebiotics and micro-encapsulation, where each Protexin product has one strain and one prebiotic blend. The two Protexin pastes are short courses for a bad few days rather than daily products.

Which has the most live cultures?

Only two of the four publish a figure per dose. Petz Park states 2.3 billion per scoop and Synbiotic D-C states 2 billion per capsule. Both pastes publish per gram of paste without saying what a millilitre weighs, so their per-dose figure cannot be worked out. Petz Park's daily total rises with your dog's dose.

Which costs the least per day?

For a dog up to 27kg, Petz Park on its 90 or 180-scoop pack, from $0.28 AUD a day including GST. Synbiotic D-C is about $0.69 a day for every dog. Both pastes cost several dollars a day, from $4.80, because they are sold for short courses. The cost section has the figures at every weight.

What is the difference between Pro-Kolin+ and Pro-Kolin Advanced?

Same strain, same published concentration, same dosing schedule. Advanced adds psyllium husk, bentonite montmorillonite, beta-glucans, soya oil and dextrose, and uses liver flavouring where Pro-Kolin+ uses beef. At the 60ml size it costs about 31 per cent more per millilitre, and it carries explicit guidance of two to three days where Pro-Kolin+ says only to use it for as long as considered necessary.

Can I give any of them to a puppy or a pregnant dog?

Petz Park states its formula suits any age and any breed but publishes no minimum age and nothing on pregnancy. Protexin's international pages carry age and pregnancy guidance for Synbiotic D-C and Pro-Kolin Advanced, and its Australian pages do not. Ask your vet before giving any supplement to a very young puppy or a pregnant dog.

Which ones contain yeast?

Petz Park contains a yeast, Saccharomyces cerevisiae boulardii, as one of its three organisms. Protexin states Synbiotic D-C contains no yeast. Pro-Kolin Advanced contains beta-glucans that Protexin's international page lists as yeast products, and it advises caution in animals with known yeast allergies. Pro-Kolin+ does not state either way.

Can I use a paste and a daily probiotic together?

Yes, and for a recurring problem that is the sensible plan. A paste acts on the episode and a daily probiotic is the one built to support the gut over the weeks after it. Protexin's international pages say to give its products a few hours apart from antibiotics or other medication. Petz Park publishes no general medication guidance, so check the timing with your vet if your dog is on anything else.

Which one has the best money back guarantee?

Petz Park publishes 40 days. None of the three Protexin products publishes one, and Petz Park itself asks for four to six weeks before you judge it.

Which are made in Australia?

Petz Park is the only one of the four that states a country of manufacture, and it states Australia. The Protexin site is published by ADM Protexin Ltd in the United Kingdom.

How we compared

Petz Park figures come from the Probiotics for Dogs page at petzpark.com.au, re-read on 17 October 2026. That covers the ingredients, the 2.3 billion CFU per 1.7g scoop, the dosing and pack-duration tables, the grain-free and lactose-free statement, the 40-day money-back guarantee, the four to six week guidance, the prices and the rating and review count on the live review widget. All prices include GST.

Protexin figures come from its Australian product pages at protexinvet.com/anz/products/, re-read on 16 October 2026 for all three products. Guidance on age, pregnancy, lactation, medication and allergens, and the strain deposit numbers, comes from Protexin's international pages at protexinvet.com/products/, read on 29 September 2026. Every statement on this page names which set it came from. Pro-Kolin+ has no international page, so its Australian page is everything Protexin publishes about it.