I am sorry to read that Cappy has been feeling poorly for the past few months. that must be so worrisome for you as his Mom.
I just took a look at WebMD for Dogs for some possible answers for Cappy's problems, and thought this page about diarrhea may be helpful: http://pets.webmd.com/dogs/diarrhea-...treatment-dogs
The discussion about food intolerance
) may help guide you.
"Food intolerancecan also cause rapid transit. Foods that some dogs seem unable to tolerate can include beef, pork, chicken, horsemeat, fish, eggs, spices, corn, wheat, soy, gravies, salts, spices, fats, and some commercial dog foods. Note that food intolerance is not the same as food allergy, which causes dermatitis and possibly vomiting, but rarely causes diarrhea."
Here is the webpage for gas: http://pets.webmd.com/dogs/guide/dog...ce-passing-gas
I hope the reasons for Cappy's distress are simple and easy to fix. Has the Vet ruled out Inflammatory Bowel Disease? See http://pets.webmd.com/dogs/inflammat...l-disease-dogs
Buster has a very sensitive gut and he will have loose stools at the drop of a hat. I was talked into Blue buffalo at the store, and he never had normal stools. His Vet said the food was too rich for him, so we started the hunt for a kibble that would give him firm stools.
Evo Red Meat seemed to be good for his gut, but after a while both Buster and Buffy were less than enthusiastic about eating it.
We now have them on Taste of the Wild Wetlands kibble plus a couple of spoonfuls of Merrick's canned. From time to time he still has a day when his stool gets really loose or watery, and I follow the Vet's instructions to give him one or 2 doses of Pepto Bismol (2 cc's) using an oral syringe. It seems to slow down his gut so that his large intestine can remove more water and form a more solid stool.
I think both of my dogs have these problems after they eat or lick grass on neighbors' lawns because other dogs use the lawns, too, and some of them may not be in the best health. My neighbors do not seem to be using lawn chemicals, but I am not totally certain.
Our lawn is very small (with no chemicals), so we do go for walks in the neighborhood for exercise. I have been trying very hard to keep them from touching the grass with their faces. Sigh....
Please keep us updated about Cappy's condition.