Jim - the little Kitty is a very good little Kitty, since she keeps other riff raff out of the garden nowadays, unless they are a large Groundhog with baby....
I think they are going to be ok with her around, I can't imagine she is that skilled in going fishing? And I will not throw in food at the edge of the pond, but throw it into the middle, so they get used to look for stuff there.
