Hi, I'm new to this. Just took Grey home today after 10 days at vet. Need a quick answer. I just gave him a shot of PZI. Forgot to ask the vet if I can/should feed him afterwards (I gave him 1/2 can Fancy Feast before shot). Can someone please advise me? This is all so new and complicated. Thanks. PS. I'm not even sure I can retrieve it if someone sends me an answer to my question.