My black pastel George has turned into quite the Casanova with his piebald girlfriend. Which is great!

But when I separated them this evening for their weekly feedings, I found several drops of blood around George's vent. I didn't interrupt a lock or anything, but they have been frolicking pretty heavily in there this last week...

Should I be worried about the blood? I was afraid to pop him.

George ate a rat afterward. He's got the week off anyway while I let my het pied male at the piebald girl. I could run George to the vet.... do you think there's reason to worry, or is this just normal wear and tear from too much enthusiastic breeding?