Tiny, but feisty, chihuahuas are super energetic. Known as "purse dogs," they're between five and eight inches tall and weigh no more than six pounds. While they're playful, they're surprisingly not ...

Cesar Millan explains how calm, confident energy stops your dog from jumping. He says to avoid touch, talking and eye contact when greeting your dog.

Positive or negative? Reinforce or punish? Learn how each quadrant affects your dog’s actions—for better or worse.

Vaccine hesitancy is on the rise among pet owners. Here are answers to some common questions about animal vaccines.