Cats seem to love getting high. When I used to grow salvia my cat was always eating the leaves and going crazy. She had a right milk addiction as well. One of the cats I have at the moment always follows me in to the garage when I smoke I guess hes trying to get passively high. I sometimes blow smoke in his direction!
Cats always seem to make a bee line for you when you are tripping as well. Guess they get some sort of contact high. Man I love cats.