Found him at 3 weeks old. Had a bite from an animal on his tail. Brought to vet, it healed, but his butt is still swollen. It is not red, normal color. Vet x-rayed and biopsied and found nothing. Don't know why it is swollen. Gave him medicine to help him poop. He does not act like it hurts or bothers him in any way. He still plays and is able to sit on it. Vet wanted to give him steroids because it made the swelling go down, but not permanently. Not comfortable giving it to him regularly as it will ruin his kidneys and he will die. Where or what can I do for him?