My 4 month old mixed labrador has always had loose stool but is otherwise very lively. When she refused to eat one time & started vomiting, the VET said she has amoeba & started her on metronidazole 250mg for a week. She immediately regained her appetite & stopped vomiting. But, she still has very loose stool, bordering on diarrhea. I feed her mixed Alpo canned wet mixed with dry pellets twice a day & she licks her dish clean. Any suggestions on how to fix her LBM? Do I change her diet or add something to it? thanks.