Last weekend I went with 2 of my kids to get a rooster. Ended up coming home with a roo, 2 silky showgirl chicks and 2 rabbits. Anywho..the buns are in a cage with a wire bottom and droppings pan. I was putting a towel in there for them to lay on but soon realized I don't have enough towels to throw away every day! Is it ok for them to be just on the wire or should I put something on top of it? Thanks!