My dogs started out with same problems you mention. I got them when they were about 3 months and everything was fine. When about a year old they began having problems with loose stools/diarrhea. Switched their food a few times over next 1/2 year. Vet thought allergies and through process of elimination found my dog Gracie had allergies to things like artificial flavors and grains. George improved a little but then began to have frequent ear infections. Ended up using a limited ingredient diet but George just kept getting loose stools/ear infections, then began having yeast and bacterial skin infections. Turns out George has allergies to artificial ingredients, certain proteins (lamb & chicken for sure), grains, potatoes, peanut butter, and unknown outdoor allergies. After blowing up my brain with all kinds of research and having an extensive talk with the vet, I put both dogs on a low glycemic, organic, grain free diet (Nutrisca Salmon & Chickpea dog food). George began improving within 4-6 weeks but, I did have stay on top of things by keeping him bathed, daily ear cleanings, etc. At that point I began to add organic coconut oil into his diet. It is 1/2 tsp per 10 lbs but you must do it gradually or they will get gas and greasy loose stools. I have mastiff mixed breeds (110 lbs) so I started with a teaspoon and gradually increased about every 3 days or so. George’s skin and ears have improved greatly and no more diarrhea! This is the first time ever in 2 yrs I have gotten to a 3 month point without seeing the vet! (I should mention that they get a little fish oil and the treats I give them are organic, grain & potato free – made with pumpkin and turkey and they like them.) I will be adding some probiotics into their diet this month but haven’t decided exactly what brand yet, I’ll talk to the vet about it when he goes in for his shots. These things may or may not work for you but worth a shot.
Anyway, the site I found most helpful (besides Dog Food Advisor) was the Whole Dog Journal. I could have saved my brain a lot of damage by looking at them first. They had a canine allergy download that explained canine allergy issues thoroughly and in a way I could understand so that I could have meaningful discussions with my vet. I am less frazzled now and feel I have a better handle on helping my dog live a healthier life. Lol, did that just sound like an ad for them? If, knock on wood, we have George’s food issues pretty well cleared up then we’ll be tackling the outdoor allergen issues next. Keeping my fingers crossed!
