Yesterday we came home to plastic everywhere. Our roommate put her empty peanut butter jar in the recycle bag (after being told by me not to as our dogs go nuts for it). Normally they don't touch the recycles but I assume the smell of peanut butter was too much temptation. I also assume Chatham ate most of it. And he got into other things in there. Today he threw up once. Just normal vomit, with some plastic pieces in it. I went out for a bit and came home to a note from my roommate saying Chatham had thrown up and there was some blood in it. I figure he may have just scratched his throat or something. He seems fine. It is almost midnight here so a trip to the vet is out. What should I watch for?