I've just noticed that in Black-Jack's cage there is blood splattered up the side and on the hallway wall where his cage is up against, not much just a small line of tiny spots. It's dried so its not fresh blood and I checked him over but can't see any sign of him cutting himself..... then when I had him down in the living room running about I found a nail on the carpet... I picked him up and checked his front paws and his back feet and he definitely has all his nails. There's nothing in his cage or his in the living room that is sharp or could cause damage... He seems absolutely fine so I don't know where this random extra nail has come from and where the blood has come from.... it's a real mystery :? :?