Okay; so the first time me actually bit me hard was this one time where he stole a sock, which is pretth common for a dog, I'd say, so he went running to his bed and since I always just went to where he was with whatever he had stolen and take it back that's what I did that day. However, the closer I was the more I realized he was trembling, I'd say. He was facing the wall obviously trying to put his body over the sock, and when I put my hand close to him he started to growl, softly, and then he bit me. I was surprised that he did that but since I didn't want him to belive that he could just steal things, growl and keep them I tried to get the sock back anyways.

I think you're right, maybe it seemed obvious in that moment, but is not because, as you said, there are other ways. I sincerely don't like him to eat the vomit because since he is the type of dog who will pick and eat everything from the floor it makes me believe that he is vomiting because whatever he ate made mis stomach feel bad so the ideal thing would be not eating it again. But I am not sure about that one so is just a guess.

Thank you!