There is this small space in between my house and the fence, and for some reason there is a dead rat back there, the space is so small that I can barely fit in there, and never really looked back there before. Well murphy ran back there, and was licking something, I came up behind him and there it was on the ground. I picked murphy up and as I was walking back to the house he threw up. he is acting normal now, no change in behavior such as acting sick or anything. Should I go to the vet for this? he is only 9 weeks old tomorrow and I am worried he might catch something since he is not done with his shots. This happened about a half hour ago.