I was serious in my suggestion as I have read that Colloidal Silver can be used on abscesses. However, although I have used it myself, for skin infections and internally, I have never personally used it on an abscess and I don't have any pets so cannot say for sure that it will help.
I think you need to look for more info on the uses of Colloidal Silver at either the CS forum...there might also be a Colloidal Silver Yahoo group.
I will try and find out more info for you.