I'm going to be calling the vet first thing on Monday. No vet I've ever been to has been open on the weekend, and it's a holiday weekend on top of that.

I threw all the food out and the container (which did have a small hole in the side directly adjacent to a small shelf on the wall).

I'm hoping the vet will at least do a competent stool examination to see if anything is brewing in the digestive area. The cat has been vomiting semi-frequently the past few months. I want to get him treated if necessary, and also know if anything he has is a threat to us as well.