Kitten wound

My mums kitten got neutered on Tuesday the 21st may. We have just noticed this wound on his front leg. It’s in the shaved area so think it’s possibly from when they put him under. He’s eating drinking and acting fine he’s just cleaning it a lot. I’ve added a picture. He’s 9months old. I’ve added a close up and one from a bit of a distance so can see the actual size  any help is appreciated

Hello - and you're right of course; it's not supposed to look like that.  Hopefully its still early enough on a Friday to say that this kitten needs to be seen by the vet - they may need pain releif and a collar to prevent interference and there may be a concern about necrosis (dead cells in the area) or systemic infection.  Please do give them a call now.