I didn't use any sort of sedative for Chase, who was about Thor's age at the time the deed was done. Our vet tends not to give anything like that, I suppose because he thinks maybe they'll limit their own behavior if it hurts. I'm not sure that's necessarily the case for dogs who are pretty stoic to begin with though. You could take some to have on hand if you find him too wound up, it would be easier to have it and not give it than find you need it at an inconvenient time and not have it available. I'd probably take some and then see how he actually does in the next few days.