The transdermal is supposed to be effective for 3 days. Right now he isn't limping, but does favor it a little when he's standing. The abscess is on the top of his heel. I don't want to overdo it, but I also want him to stay with the herd because he'll be easier to catch (and find!). That said, good chance of rain later today/tomorrow, so holding off for now.How often is he getting banamine? I try to minimize use because I understand it can have some side effects to rumen function . . . maybe two or three days between treatments and discontinue as soon as possible. Usually do text consults with my vet before using.