I was doing a serch and came up with this website that is an overview of all states with pet lemon laws. I thought it would be a good link to pass on. I do not know how current it is, but I thought it was a good starting point.

http://www.malteseonly.com/lemon.html

Here's another site
http://www.aspca.org/site/DocServer/Lemon_Laws.pdf?docID=6741