My cat was diagnosed with what the vet believes is acute renal failure. My cat has been hiding under the bed for days and was not eating or drinking on his own (i was force feeding him). We have been taking him every day to get fluids through an IV to hopefully flush out his kidneys. Today he has started to urinate a lot, i'm guessing from all the liquids he's been treated with. He has also started licking up the liquid from the wet food but has not started eating the chunks yet. Are these positive signs that he might be getting better? He still has some trouble drinking water from his dish and hides all the time. Another thing, when he urinated, at the very end he started meowing like he was in pain. Why would it hurt him to pee?