I'm not sure if this is pee or not but it has dried with a light orangish tint to it. It has dried on the carpet now. My mom said when she was cleaning her area there was some orange sludge stuff a couple of days ago. She is about 3-4 months. Is eating and drinking a lot and eats parsley, cilantro, romaine (on occasion, just a pinch) unlimited hay, and Oxbow "young rabbit" pellets. She is active and seems okay. I've heard some bunnies have orange pee, should I be worried?