My dog has a wound below his right ear, I can not tell what it is from and never seen him bleeding before. When I was playing with him last night I noticed it for the first time. It was full of pus so I started cleaning it with peroxide. I also tried cutting some fur away to see how bad and what he may have done, but he is to sore. Why did I not see him bleed from this? And is there going to be problems with infection or gang green or anything? He looks alot better today but cant see it all.