I caught Summer urinating outside of the box this morning. I haven't changed anything from her usual routine or anything. She has been drinking out of the toilet (I don't put any chemicals in it) any chance she can....she also drank out of the faucet in the bath tub last Sunday while I was cleaning out the fish tank. So, I took her to the vet, and she is still there...her bladder was empty when I first took her there, so I had to leave her there. Please leave me some moral support...I hope she'll be okay.