My 8 - 9 months old female rabbit excreted a flesh like thing along with a few drops of blood. The flesh like thing is surrounded by semi solid blood like thing. The male rabbit has been in the heat and been doing her since last 2 days before this happened. He did it previously too like a month ago maybe. The male rabbit is about 2 months younger, smaller in size and of a different breed than female. It's night time and no vets are open now. I'd like to know what that thing is and how much should I be worried about her?