Yep! That's a frozen mouse in the water bucket! He (or she) must of jumped in and then couldn't get out and froze to death. ( I feel a little bit sad for the mouse) I hope it didn't take to long. When I got home the water was melted and the mouse's itty bitty head looked like it had been chewed on.
When the kittens were playing with it this morning they would ever so slowly touch the head with a paw and then jump back. They must of found some courage after I left for work.
And yes, that is a goat dropping in the water bucket. It was still there when I got home so the kittens didn't play with that.
F.M. of A. stands for Future Mouser of America.