We have two cats and pondered about this long time ago. The best resource we found was the BBC documentary: http://www.bbc.co.uk/programmes/b04lcqvq http://www.

We have two cats and pondered about this long time ago. The best resource we found was the BBC documentary: http://www.bbc.co.uk/programmes/b04lcqvq http://www.bbc.co.uk/programmes/b04lcqvq also has an e-book http://www.bbc.co.uk/programmes/articles/4Hbdn6T21hKDH6bfVBkj4Wm/a-guide-to-your-cat-interactive-ebook http://www.bbc.co.uk/programmes/articles/4Hbdn6T21hKDH6bfVBk...