Veterinarian Nicholas Dodman, the author of "Dog Who Loved Too Much" and a recent Fresh Air guest. He has a new book about cats, "The Cat Who Cried for Help" (Bantam Books) which, among other things, is about mortifying cat behaviors like aggression, and out-of-the-litter-box wetting.
Naturalist and biologist Roger Tabor has studied house cats for twenty years. He has prepared television series on felines for the BBC and has written several books on the subject. His latest book is called "Understanding Cats: Their History, Nature, and Behavior" (Reader's Digest).