I have a male cat who is about 1.5 year-old. He got outside and ended up getting in a bad fight with other cats. When he came back home, one of his wounds was badly infected. The vet drained the wound and bandaged the arm. He is healed completely except for a slight limp.

What types of Remedies can help build a cat’s immune sysytem? I want to make sure that his immune system is not deficient after this infection. Any recommendations?
I know there are dry and canned cat foods out there that help with immune system health, but I’m looking for tips on Natural Pet Remedies that will give my cat’s system a big boost to get him up to speed.