Can diet alone control IBD in dogs?

Often, yes. In referral populations roughly half of dogs with chronic enteropathy respond to a diet change alone, and longer follow-up puts the food-responsive share higher, around 73% at one year in one study of 60 dogs. That is unusually high for a chronic condition, and it is why a proper diet trial comes before long-term medication.

Does my dog need a hydrolysed diet?

Not necessarily. In a randomized, blinded, controlled trial of 31 dogs, 83% of the non-protein-losing cases responded to their initial diet, with no difference between the hydrolysed diet and a non-hydrolysed one with few ingredients. The authors concluded that changing the diet, independent of the specific protein restriction, induced long-term remission.

Is a raw diet good for dogs with IBD?

It can serve as a novel-ingredient trial if the protein is genuinely new to your dog, since the evidence credits the change itself. But it is the wrong choice for protein-losing intestinal disease, where fat restriction is the treatment, and for large-bowel disease, where added fibre is what helps. Your vet should decide which subtype your dog has first.

How long before I know if a food is working?

Many dogs improve within two to four weeks, but give a trial the full time your vet specifies and change nothing else during it: no new treats, chews, or flavoured supplements. Worth knowing: in one study, 17 of 27 food-responsive dogs had already failed at least one previous diet trial, so one failure does not mean diet is not the answer.

Is AlphaPak suitable for a dog with IBD?

Possibly, for a small-bowel case where chicken or beef is genuinely new to your dog, but not for protein-losing disease or large-bowel diarrhea. Two honest limits: our recipes are not novel relative to each other, since they share several ingredients, and there is no added vitamin and mineral premix, which matters for a dog who is not absorbing well.

What is the difference between small-bowel and large-bowel diarrhea?

Broadly, small-bowel problems tend to produce larger volumes of loose stool with weight loss, while large-bowel problems produce frequent small amounts, often with straining, mucus, or fresh blood. They point to different treatments (fat restriction versus added fibre), so it is one of the first things your vet will work out.

Health Conditions

Feeding a Dog With IBD or Chronic Diarrhea

AlphaPak · Reviewed by our veterinary and formulation team · Updated August 3, 2026

This is the condition where food does the most work. Around 73% of dogs with long-running gut inflammation turn out to respond to a change of diet. Here is the striking part: the change itself does much of it. In one trial, a fancy hydrolysed diet did no better than a simple one with few ingredients.

Flat illustration of a dog lying stretched out on its side, fully relaxed

The good news about this condition

Chronic gut disease in dogs is unusual among long-term conditions in how often food alone is the answer.

In referral populations, roughly half of dogs with chronic enteropathy respond to a diet change alone (Tolbert et al., 2022). Followed for longer and reclassified, the food-responsive share is higher still: around 73% in a study of 60 dogs followed for at least a year. Tellingly, 17 of 27 of those food-responsive dogs had already failed at least one earlier diet trial. One failure does not rule diet out.

The finding that changes how you should think about this

The instinct is to hunt for the right technology: hydrolysed protein, a specific novel meat, a particular additive. The best-designed trial in this area suggests the hunt is somewhat beside the point.

In a randomized, blinded, controlled trial of 31 dogs with chronic enteropathy, 19 of 23 (83%) of the non-protein-losing cases responded to their initial diet. There was no difference between the hydrolysed diet and the non-hydrolysed one with few ingredients. All 18 dogs followed to 26 weeks stayed in remission. The authors' conclusion was that changing the diet, independent of antigen restriction or supplemental ingredients, induced long-term remission (Simpson et al., 2023).

So what appears to matter is a clean, genuinely different, consistently fed diet, given long enough. That is good news for owners, because it widens the options and lowers the cost.

But which subtype matters enormously

This is where a single recommendation falls apart, and where most articles on this topic are unhelpful.

Different presentations, opposite dietary answers
Presentation	What the evidence supports
Small-bowel disease, not losing protein	A diet change to something genuinely different: hydrolysed or few-ingredient both work
Protein-losing disease or intestinal lymphangiectasia	Fat restriction, often ultra-low fat. This is the treatment, not an adjunct
Large-bowel or fibre-responsive diarrhea	Added fibre, the opposite direction from a low-residue diet

The evidence behind those last two rows is real. In dogs with intestinal lymphangiectasia, 19 of 24 (79%) responded to dietary fat restriction, allowing steroid doses to be reduced (Okanishi et al., 2014); other studies have found low-fat diets achieving remission as the only treatment in a meaningful share of protein-losing cases. And for large-bowel diarrhea, a high-fibre diet got 11 of 11 dogs to a normal stool score compared with 6 of 11 on a standard diet (Lappin et al., 2022), with psyllium supplementation producing good-to-very-good responses in around 90% of dogs in another study.

Where AlphaPak fits, and where it clearly does not

A reasonable candidate: a small-bowel case, not losing protein, where chicken or beef is genuinely new to your dog. On the trial evidence above, a few-ingredient whole-food diet is a legitimate option and does not have to be hydrolysed to work. Our ingredient lists are short and fully disclosed, which matters when the whole point is knowing exactly what your dog is eating.

Not suitable, and these are firm:

Protein-losing disease or lymphangiectasia. We run about 57 to 62 grams of fat per 1,000 calories. Fat restriction is the treatment here and we are two to three times the wrong side of it.
Large-bowel or fibre-responsive diarrhea. Our crude fibre caps at about 5% dry matter in the Chicken recipe. The therapeutic direction is adding fibre, and we are not built for it.

Two limits worth knowing even where we might fit:

Our two recipes are not a second fresh start. They share flaxseed, apple, green bean, carrot, broccoli, sweet potato, and bone meal. A dog who did not improve on our Chicken has not had a genuinely new diet by switching to our Beef. If your vet wants a second novel trial, it needs to be genuinely novel.

There is no added vitamin and mineral premix. Mixed tocopherols is a preservative, not a nutrient package. For a dog who may not be absorbing well, that is worth raising. Research in dogs with protein-losing enteropathy has found significantly lower vitamin A, D, and E levels than in healthy dogs, so a malabsorbing dog starts from a deficit.

Running a diet trial that actually gives you an answer

Get the subtype identified first. Everything above depends on it.
Change one thing. New food only: no new treats, chews, dental sticks, or flavoured supplements.
Be strict. Nothing else at all, from anyone in the household.
Give it the full time your vet specifies rather than judging it in week one.
Keep a record of stool quality, appetite, weight, and energy. Your vet needs the pattern.
If it fails, do not conclude diet is irrelevant. Most food-responsive dogs in the research had failed a previous trial.

For the milder, longer-running version of this (a dog with an unsettled gut but no diagnosis of chronic disease), our sensitive stomach guide is the better starting point.

Common questions

Can diet alone control IBD in dogs?: Often, yes. In referral populations roughly half of dogs with chronic enteropathy respond to a diet change alone, and longer follow-up puts the food-responsive share higher, around 73% at one year in one study of 60 dogs. That is unusually high for a chronic condition, and it is why a proper diet trial comes before long-term medication.
Does my dog need a hydrolysed diet?: Not necessarily. In a randomized, blinded, controlled trial of 31 dogs, 83% of the non-protein-losing cases responded to their initial diet, with no difference between the hydrolysed diet and a non-hydrolysed one with few ingredients. The authors concluded that changing the diet, independent of the specific protein restriction, induced long-term remission.
Is a raw diet good for dogs with IBD?: It can serve as a novel-ingredient trial if the protein is genuinely new to your dog, since the evidence credits the change itself. But it is the wrong choice for protein-losing intestinal disease, where fat restriction is the treatment, and for large-bowel disease, where added fibre is what helps. Your vet should decide which subtype your dog has first.
How long before I know if a food is working?: Many dogs improve within two to four weeks, but give a trial the full time your vet specifies and change nothing else during it: no new treats, chews, or flavoured supplements. Worth knowing: in one study, 17 of 27 food-responsive dogs had already failed at least one previous diet trial, so one failure does not mean diet is not the answer.
Is AlphaPak suitable for a dog with IBD?: Possibly, for a small-bowel case where chicken or beef is genuinely new to your dog, but not for protein-losing disease or large-bowel diarrhea. Two honest limits: our recipes are not novel relative to each other, since they share several ingredients, and there is no added vitamin and mineral premix, which matters for a dog who is not absorbing well.
What is the difference between small-bowel and large-bowel diarrhea?: Broadly, small-bowel problems tend to produce larger volumes of loose stool with weight loss, while large-bowel problems produce frequent small amounts, often with straining, mucus, or fresh blood. They point to different treatments (fat restriction versus added fibre), so it is one of the first things your vet will work out.

Sensitive stomach guide Find your recipe Learn hub

Sources

Simpson, K. W., Miller, M. L., Loftus, J. P., Rishniw, M., et al. (2023). Randomized controlled trial of hydrolyzed fish diets in dogs with chronic enteropathy. Journal of Veterinary Internal Medicine. DOI: 10.1111/jvim.16846
Tolbert, M. K., Murphy, M., Gaylord, L., & Witzel-Rollins, A. (2022). Dietary management of chronic enteropathy in dogs. Journal of Small Animal Practice. DOI: 10.1111/jsap.13471
Okanishi, H., Yoshioka, R., Kagawa, Y., & Watari, T. (2014). The clinical efficacy of dietary fat restriction in treatment of dogs with intestinal lymphangiectasia. Journal of Veterinary Internal Medicine. DOI: 10.1111/jvim.12327
Lappin, M. R., Zug, A., Hovenga, C., Gagne, J., & Cross, E. (2022). Efficacy of feeding a diet containing a high concentration of mixed fiber sources for management of acute large bowel diarrhea in dogs in shelters. Journal of Veterinary Internal Medicine. DOI: 10.1111/jvim.16360

AlphaPak is a food, not a medicine. Our products are not intended to diagnose, treat, cure, or prevent any disease. Statements about nutrition describe the role of whole-food ingredients in supporting normal health and are not a substitute for veterinary care. Individual results vary.