Our cat Daisy just today started doing something strange. She goes to different areas in the house (sometimes hidden, sometimes not) where she squats as if to pee, but nothing comes out. She has a litter box, and she did it in there once. She also went in our bathroom, behind a garbage can and on a pile of clothes. I saw her drinking a little bit of water earlier. What does this mean?!! And if this is kidney failure, what are we to expect?