bleeding mouse?

do frozen/thawed mice bleed? I ve been feeding my bp frozen/thawed mice for a while and just now i fed him one and he bit the mouse acouple times and let go so he could find its head and he bit it on the back and it started to bleed i was just hoping it wasnt six's mouth.
thanks but never mind i guess they do he just busted the all the guts out of that one sorry about that. lol

Yes, they can leak blood after they've thawed. The freezing process can rupture tiny capillaries that will allow blood to ooze out when they are thawed.