Dear spectre,
I lurk here, but actually registered to let you know your kitty already is suffering from the first stages of kidney failure. A raging thirst is a cardinal symptom of this. My kitty, Ti, died from renal failure (associated with old age, tho). If it is acute, then your kitty will be dead in a few days. You need to take him/her to the vet, now. Your choice and your responsibility. If you don't believe us, check the symptoms of kidney failure online.
Best of luck. (PS. None of my cats ever went into the crate without a bloody fight.)
Wow, thank you for registering just to respond to me. He's sleeping now...
I'm watching him closely now. Ya'll have scared me enough..
Welcome to FR, and I hope you'll stick around..
sw