Okay. I have an appointment tomorrow morning with the vets. Im worried though.

the other morning Patch (My neutered male) came home with this http://imgur.com/aR6GsdJ,68xLQOA
A bald spot, and a small red dot (just a mark on his skin) which bled a tiny bit.

Ive just got home from work and hes come in with these.




It has turned into a puncture hole and his skin is gone I can see the soft tissue/flesh inside. Its bleeding a little and also clear liquid (can be seen on the pics)
He is allowed to go out so I know hes done this outside but I am unsure what he has done in order to obtain this injury.

Im worried sick, Im keeping him in now all day and my female socks (because its unfair to allow her out and him not)
and I have a vets appointment tomorrow.

thoughts?