Hi guys, just got my cat neutered today, he's turning a year old in November. When I picked him up they said everything went well. But when I got home I noticed there was blood everywhere he would sit. Called the vet and unfortunately they were closed for the day. Anyways he was extremely agressive after vet visit, hissing and growling, so I couldn't get near him to check his incision area for a while. I finally managed to get a picture after he calmed down a bit and saw something hanging out of his incision area. I can't help but worry. Is this normal?