Oh no!!

I think what JenL said is absolutely right. Antibiotics CAN cause diarrhea. I would definitely take Taz to her OWN vet where they are familiar with Taz. Force feeding her, even if it's putting canned kitten food (kitten food has more nutrients) on her finger and sticking it in Taz's mouth will help her taste it. It also might be that Taz can't smell the food. Cats won't eat what they can't smell.

HUGS and prayers coming from CT. Please, keep us posted!!