Thank you so much for your replies, it's helped a lot.
I've just let him out again & he's his usual mad self, but the racket he was making in the crate was driving me nuts.....imagine a creaky door at umpty decibel volume
i'm trying to get him to be fairly still, but fighting a losing battle!
I've bathed the wound with salt water, as directed by the vet, & it all looks ok. He had puppy teeth removed as well, he'd two rows, looked like Jaws, but you'd never believe it to see his energy today !
Think I need some of whatever he's on