Hmmmm, this one sppears to be an injection, which would be good if they're stung by something and have a reaction, but I don't think I'd wanna have to give a shot all the time. I also couldn't find any information about the dosage, like how often you'd have to give it and how much. Let me know what you find out from your vet.
I don't want to give daily injections either but surely there's a way to administer it orally. I'll find out and let you know....
Tuffy is really starting to itch now. If he was out on pasture with trees and fence posts, he'd be scratching himself bloody. He's in a round pen (no sharp edges), covered with a sheet, fly mask and tons of fly spray during the night and in a stall during the day. His face is sunburning so bad that I'm keeping him up during the day.