Veterinary source boundary: “Hindgut ulcers” is a loose owner term. It can point toward right dorsal colitis, colitis, dysbiosis, acidosis, NSAID injury, parasites, sand, diet disruption, or other intestinal disease. This page helps you organize questions; it does not diagnose the hindgut or replace veterinary care.
Quick Answer: Hindgut Is a Location, Not a Simple Diagnosis
If omeprazole or GastroGard did not solve the problem, the dose may not be the issue. PPIs reduce stomach acid. They do not directly treat every cecum or colon problem.
The useful move is to separate the target:
| Question | Why it matters |
|---|---|
| Was the stomach scoped? | A clean or improving stomach changes the next conversation. |
| Are there manure changes? | Loose manure, fecal water, or diarrhea shifts attention beyond classic EGUS. |
| Is the horse on NSAIDs? | Bute, banamine, and other NSAIDs can affect gut safety. |
| Did diet or starch load change? | Hindgut fermentation can react strongly to starch overflow or abrupt feed changes. |
| Are there emergency signs? | Colic, fever, severe diarrhea, dehydration, or reduced manure need prompt veterinary help. |
Foregut vs Hindgut
| Area | Common owner language | Why the treatment model differs |
|---|---|---|
| Stomach / foregut | EGUS, squamous ulcers, glandular ulcers | Acid exposure and stomach lining are central. PPIs may be part of the plan. |
| Cecum and colon / hindgut | Hindgut ulcers, colitis, right dorsal colitis, acidosis | Fermentation, inflammation, NSAID risk, diet, parasites, and diagnostics matter more. |
This is why “the ulcer meds did nothing” is not automatically a failed medication. It may mean the main driver was never primarily stomach acid.
Signs Owners Associate With Hindgut Problems
These signs are not diagnostic by themselves, but the cluster is worth writing down:
- loose manure, fecal water, or intermittent diarrhea
- right-flank sensitivity or belly brushing sensitivity
- girthiness that persists after gastric treatment
- intermittent colic-like discomfort
- poor topline or weight instability
- sensitivity after diet changes or high-starch meals
- worsening during NSAID use
If the main signs are girthiness, spooking, and under-saddle resistance, also use 10 Invisible Ulcer Symptoms so you do not miss overlapping pain sources.
Red Flags: Do Not Wait on These
Call your veterinarian promptly for:
- colic signs
- fever or depression
- severe diarrhea
- dehydration
- blood, black manure, or dramatic manure change
- reduced manure output
- ongoing weight loss
- worsening pain after medication or feed changes
Those signs move the issue out of owner research and into medical triage.
What to Review Before Buying Another Supplement
Most supplement decisions are premature until the basic pattern is clear.
| Review item | What to ask |
|---|---|
| Forage | Is hay consistent, clean, and available without long gaps? |
| Starch | Is the concentrate load too high for this horse? |
| Feed changes | Did symptoms follow a new feed, batch, hay type, or turnout change? |
| NSAIDs | Has bute, banamine, or Equioxx changed the risk picture? |
| Parasites and sand | Are fecal testing, deworming history, or sand exposure relevant? |
| Water | Is intake normal, especially during travel, winter, or heat? |
Use Best Feed for Ulcer-Prone Horses for the diet cleanup step. If fecal water is the dominant sign, use Fecal Water Syndrome in Horses.
Why PPIs May Not Help
Omeprazole, GastroGard, and Nexium conversations are stomach-acid conversations. If the pain source is farther back, acid suppression may leave the key driver untouched.
That does not mean PPIs were useless. It means the case may need a wider model:
- foregut diagnosis and recheck
- NSAID risk review
- diet and starch audit
- manure and hydration assessment
- parasite or sand discussion
- veterinarian-directed mucosal support where appropriate
If the veterinarian mentions sucralfate as part of a mucosal-protection conversation, read Sucralfate for Horses for timing and role questions.
Better Questions to Bring to the Vet
- Do the signs point more toward stomach, hindgut, or a non-gut pain source?
- Does NSAID exposure change our concern for right dorsal colitis or other gut injury?
- Should we run fecal, bloodwork, ultrasound, gastroscopy, or another diagnostic step?
- Are probiotics, yeast, psyllium, sucralfate, or diet changes appropriate for this case?
- What signs mean this is urgent rather than a management experiment?
For supplement realism, pair this with Probiotics for Horses with Ulcers.
FAQ
Are hindgut ulcers the same as gastric ulcers?
No. Gastric ulcers involve the stomach. “Hindgut ulcers” is a loose owner term for several possible cecum or colon problems.
Why might omeprazole not help?
Omeprazole reduces stomach acid. If the main issue is colitis, dysbiosis, acidosis, NSAID injury, parasites, sand, or another hindgut problem, a PPI may not address it.
What signs make hindgut problems more urgent?
Colic, fever, depression, severe diarrhea, dehydration, blood, black manure, marked weight loss, or reduced manure output should prompt a veterinary call.
Bottom Line
If the stomach looks good but the horse still looks painful, widen the model. Hindgut problems are real, but the phrase is imprecise. The practical path is diet consistency, red-flag awareness, and veterinarian-guided diagnostics before another product claim.