"Dedicated to preserving the long lost art of body modification in housepets"
Strong candidate for the sickest site on the web, these people claim to create artistically deformed kittens by cramming them into jars and such. The idea is that the kitten's soft skeleton takes on the shape of the jar as it hardens (the skeleton, not the jar).
The site features a number of pictures of kittens crammed into jars, but not enough to convince that this isn't just a great big hoax. Further evidence of hoaxing lies in claims that you require a certificate in "kitticulture" to perform these enormities, and that the finished product can be delivered by mail. One way or the other, somebody has way too much time on his/her hands.
The site also offers for sale a number of "Constriction Vessels", including a glass hound and a Klein Bottle.
http://www.bonsaikitten.com/. Mirrored at http://www.ding.net/bonsaikitten/
Erik Fish artfully demonstrates the problems inherent in humour on the web by taking my writeup far too seriously.