What's the original food and what's chappie? If the original food is crap food, that would be the problem. (All foods say "complete".) I would keep her on whatever food she isn't having diarrhea on, assuming it's a decent food.
I would talk to my vet (or an internist) about testing her for EPI (Endocrine Pancreatic Insufficiency) Symptoms are: loose stool, weight loss and ravenous appetitite. Basically the pancreas has quit producing the enzymes which digest food, and food is passing through without providing nutrition. I did know one Belgian who had it. Regular vet was treating for everything else under the sun, she went to OSU and they DXed it immediately as EPI. Put her on meds and she is doing great. Before she went to the specialist, she was down to around 26 lbs and was skin and bones.Hoping someone can help we have a Belgian shepherd she started having diarrhea a few months ago she doesn't seem ill at all after having a stool test at the vet and been given some special food she was fine but every test came back negative. When we changed her back to her original food (dry complete) the same problem came back we've now got her on chappie which doesnt seem to be a problem apart from her losing weight and she's constantly hungry. Everytime we try to reintroduce her original food the same problem happens even just adding a handful in with the chappie affects her. Any suggestions are welcome.
This^^^^^. Also get a geriatric blood workup done. AFTER you do that and rule out any vet issues, change to a better quality food. Look at www.dogfoodanalysis.com and find a 5 star or better food. Add some canned pumpkin (a couple of heaping tablespoons) (pure...not spiced), to stop the loose stools related to a food change.I would talk to my vet (or an internist) about testing her for EPI (Endocrine Pancreatic Insufficiency) Symptoms are: loose stool, weight loss and ravenous appetitite. Basically the pancreas has quit producing the enzymes which digest food, and food is passing through without providing nutrition. I did know one Belgian who had it. Regular vet was treating for everything else under the sun, she went to OSU and they DXed it immediately as EPI. Put her on meds and she is doing great. Before she went to the specialist, she was down to around 26 lbs and was skin and bones.