We love our dogs and cats, but their behavior can be baffling. (Maybe they have the same thoughts about us!) On Tuesday's AU, our guest is veterinarian Gary Weitzman, President and CEO of the San Diego Humane Society and SPCA, and author of "How to Speak Cat: A Guide to Decoding Cat Language" (published by National Geographic.). Dr. Weitzman is also author of "How to Speak Dog," and "Everything Dogs." We'll answer your dog and cat questions, and talk about the San Diego Humane Society's current effort called "Getting to Zero:" a comprehensive plan to save the life of every healthy and treatable animal in San Diego Animal Welfare Coalition shelters.