i take it to the vet if the wound is deep or in an award place if not to bad i would try an glue it or get butterfly stitcher's if ya can get them to stick
i only ever had one that needed the vet and he said they dont do well under anesthetic and that could kill it if the stress don't
i had it done and he lived for many years but i never raced back then so don't know if slowed him down good luck what ever you decide to do