Dog and Cat Diarrhea That Won’t Go Away? Try This First
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Try This Soluble Fiber First
Do you have a dog with chronic gut issues?
I see it all the time. Ongoing diarrhea, loose stool, vomiting, maybe even mucus or blood in the stool. You have likely already been to the clinic more than once. You have probably tried a number of different medications.
But there is a newer study showing something much simpler may help. In fact, it is a basic home remedy that is likely already in your kitchen.
Dr. Jones’ Ultimate Probiotic Formula for Dogs and Cats

What the Research Is Showing
In this study, they looked at dogs with chronic intestinal issues. These included diarrhea, vomiting, excess gas, and poor stool quality.
The focus was simple. Add soluble fiber to the diet and see what happens.
We already know from human research that when people get enough soluble fiber, many chronic gut issues improve. Now we are seeing something very similar in dogs.
What Is Soluble Fiber and Why It Works
Not all fiber is the same.

Soluble fiber changes when water is added. It forms a gel-like substance. That gel does a few important things inside the gut:
- It helps calm inflammation
- It adds bulk to the stool
- It supports healthy digestion
- It feeds beneficial gut bacteria
It also helps absorb excess water, which is key for dogs with diarrhea.
Psyllium Husk: The Most Important One
The study focused on psyllium husk, and the results were impressive.

Dogs with chronic diarrhea were given psyllium daily. After 30 days:
- 50 percent had a very good response
- Another 40 percent had a good response
- That is 90 percent of dogs improving overall
Stools became more normal, frequency decreased, and many dogs even gained weight again.
Why Psyllium Works So Well
When psyllium is mixed with water, it turns into a thick gel. That gel moves through the intestines and:
- Binds excess fluid
- Soothes the gut lining
- Supports a healthier microbiome
How I Suggest Using It
Start low and go slow.
- Begin with about one quarter of the target dose
- Gradually increase over time
- Always make sure your dog is getting extra water
For larger dogs, this may build up to about 1 to 2 tablespoons daily, split into two servings.
Ground Flaxseed: My Favorite Long Term Option
The second option I often use is ground flaxseed.

It is also a soluble fiber, although it works a bit more slowly than psyllium. It also has added benefits:
- Rich in omega-3 fatty acids
- Supports skin and coat health
- Contains helpful plant compounds
Suggested Use
For a larger dog, I often use about 1 tablespoon twice daily.
For smaller dogs, scale it down accordingly and start with a lower amount first.
Flax is easy to mix into food, and most dogs tolerate it well.
Pumpkin: The Easiest and Tastiest Option
The third option is plain canned pumpkin.
This is a mix of soluble and insoluble fiber, plus added nutrients.

Pumpkin helps:
- Firm up loose stool
- Support digestion
- Feed good gut bacteria
Suggested Dose
About 1 teaspoon per 10 pounds of body weight daily.
It is especially helpful for mild diarrhea or constipation.
Why Fiber Makes Such a Big Difference

When you add soluble fiber, a few key things happen:
- It absorbs excess fluid in the gut
- It produces short chain fatty acids that reduce inflammation
- It improves the balance of gut bacteria
- It supports normal digestion
In many cases, this is exactly what the gut needs to reset.
Where to Start

If your dog has ongoing diarrhea, here is how I would approach it:
- Start with psyllium husk
- Add plenty of water
- Use it consistently for at least 30 days
- Consider flaxseed for long term support
- Use pumpkin as an easy add-on
Keep it simple and consistent.
Final Thoughts

Chronic diarrhea can be frustrating. It often leads to repeated vet visits, tests, and medications.
But sometimes the answer is much simpler.
Do not overlook fiber. It is inexpensive, safe, and in many cases, very effective.
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