Well this was an interesting thread and a little different. We learn so much from each other on here, don't we?

Kirsten I'm glad Luna is feeling better. She was probably grumpy because she had to go to the litterbox so much. I get grumpy too, if I have "one of those days", and we all do from time to time!

Barbara it is always good to learn more about the way cats' kidneys work and the differences between their systems and ours, thank you. Since Cleo was diagnosed with CRF I feel I can't read enough about it.