Chess,
Oh man, I feel for you. I can't tell you how many times I've woken up in the middle of the night to the sound of the cat puking. Those who own cats know what sound I'm talking about. "Shrek 2" pretty much nailed the hairball experience.
Cat urine is a bad smell. No fun. Sometimes I wish I had gone the goldfish route.

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"Nothin' up my sleeve. . ." --Bullwinkle J. Moose