From Jon Carroll on SFGate.com:
"Cats are the bureaucrats of the animal kingdom; they blandly deny responsibility and point to a memo they sent in 1999 explaining the whole thing."Of course, this isn't the line that was quoted by the person who posted that link to the mailing list I found it on. Their favourite line was, "That's the great thing about a zoo -- inappropriate copulation available for all," which is also a good quote.