Tonya,
Riley had a wound like that a couple of weeks ago. The 4 dogs had been outside playing, and when they came in, he had that bare spot like that, on his leg. I put hydrogen peroxide on it to clean it out, and he didn't even move, so I figured it wasn't open at all, and it didn't bother him one bit for me to touch it. It was bizarre.

I would keep them separated--who knows what's going on!!!