I think you should switch foods. The recommendations on the Natural Balance website are to feed 2/3-1 cup for an adult dog 10 pounds and under.
Your dog is an adult, right?
If I am reading your post correctly, you are only feeding 1/4 cup a day. Maybe this food isn't agreeing with him because if a 10 pound dog can eat 2/3-1 cup a day, a five pound dog should eat probably 1/3-1/2 cup a day. There will be some variation because dog food companies sometimes do tell you to feed more than you should. I don't think any dog should gain weight on 1/4 cup of food.
Natural Balance makes a reduced calories formula.
It could have been the two kongs a day doing it though.
I would add green beans to the diet.
__________________ Crystal  , Ellie May (RIP)  , Rylee Finnegan  , and Gracie Boo🐶 |