On the floor!

Came home and saw something on the floor about 1cm in diameter. Thought it was a pinkish stone and picked it up. Then discovered it was very hard but the outside felt slightly soft-almost rubbery. Also it had some bluish lines in it and was oozing blood from one end

All the animals seem ok (although Ali has mast cell tumours butthe seem intact).

Has anyone come across anything like this before?
