I hope that whatever is causing this can be easily treated. My Storm started drinking a lot and he also makes large pee biscuits but he's on prednisolone which will cause this to happen. I e-mailed my vet about him drinking a lot more than usual and she said that as long as he wasn't loosing weight then I shouldn't be too concerned. He was loosing weight and I didn't even notice. It turned out that he has hyperthyroidism. He's now on pills for this and is doing very well. I hope that everything will go well tomorrow. Lots of prayers and positive thoughts are being sent Tilly's way.