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Why is my dog fussy eating with diarrhea after finishing medication?

Updated On September 23rd, 2025

Pet's info: Dog | Labrador Retriever | Male | neutered | 8 years and 2 months old | 95 lbs

Dog been on nisamox for a week but finished them on Monday. Since Tuesday he's eating but taking his time and being a bit fussy which is not normally like him, eating cooking food rather than the raw he usually eats He has mild diarrhea and just seems a bit off colour

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on March 15th, 2017

Poor Sam! I'm not sure what is was on nisamox for, but it could be that whatever condition he was being treated for is not cured yet and that's causing him to be a bit fussy with his eating. As for the diarrhea, he could be suffering from a GI illness, may have eaten something rotten, has intestinal worms, or it could be due to the change in diet. Make sure Sam is up to date on his deworming treatment, giving him one if he's not. I can also give you a home remedy to try to see if that helps with his diarrhea before having to take him into the vet. Withhold food for 12-24 hours, then feed a bland diet of boiled white meat chicken (no bones) and white rice in small amounts several times a day for a couple of days. Then slowly add back in his normal diet. If the diarrhea continues on the bland diet, he starts vomiting food, stops drinking water, starts vomiting water, or becomes very lethargic, he will need to see a vet right away. I would give the vet a call to let them know you are seeing these signs in Sam. They may want to give him additional course of the nisamox if they are concerned that the condition it was being used to treat isn't cured.

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