If the Tail does turn into an infection, which is shouldn't if you fallow the other peoples advise, take it back to the vet first, but go out and buy some Betadine. this stuff works wonders on cleaning the wound and healing it up nicely. it did a great job on my BP with scale rott. you can even buy it now to help keep it clean.
I hope from now on you'll feed pre-killed.
~life is like a big toilet and guess what your in it!~