I've just noticed my chihuahua looking very sorry for himself in his bed so I've gone to let him out and noticed he must have been chewing his back end. I've had a closer look and there was a big red lump next to his bum hole, it had a slight white bit on it so been the twat I am I thought I'd prod the area. Low and behold a shit load of puss came out so I carried on until it bled. I know I know, I probably shouldn't. I've rinsed the area off with cool boiled salty water and have him in the vets for 6.40 this eve.
Is there anything I can do in the meantime? I have him wrapped up in a towel on my knee whilst I work so he can't irritate further. Also how much is the vet likely to charge? Assuming he will need antibiotics.