I decided to try to do some hunting and gathering to figure out who the heck figured out they could keep cats in the house by giving them a box of clay to poop and pee in.
It looks like it was as late as 1947 when Ed Lowe figured out he could use Fuller's Earth for kitties to do their deed in. He later sold the company in the 1990s for several million dollars.
Just wanted to share the rich pageant of history that is kitty litter.
Source http://www.ideafinder.com/history/inven ... ;itter.htm

