You'll often hear that a previously friendly dog suddenly bit a person "out of nowhere." But did she really? Or did stressors pile up till the dog just broke?

You've taught your dog to come when called -- congratulations! Except ... forget about it when she's playing with other dogs. How can you get her to pay attention to you then?

More reasons why your cat may be avoiding the litter box -- and how to get her back into good habits once you've resolved those problems.

Cats don't usually need to be "litter box trained" the way dogs need to be housetrained. But if the litter box doesn't match your cat's preferences for a comfy toilet, she may find somewhere else to go. In Part 1 of this series, the Dog Trainer explains what makes an attractive litter box, and what doesn't.

Until recently, there's been no independent safety testing of car harnesses for dogs -- only manufacturers' claims in ads. Now the Center for Pet Safety, an independent nonprofit, reports and names names. Hang on to your seatbelts; it's going to be a bumpy ride.

It’s often said that when we comfort a frightened dog, we’re rewarding fear. Learn whether that’s true, and how best to help out your worried, startled, or frightened dog.

Learn what to do if your dog is super-friendly, but your guests aren't happy to have him greet them.

Why do some dogs interfere when people are kissing, necking, or having sex? And what should you do about it? Find out

There’s more to good dog-walking than just holding one end of the leash. Here’s what to look for in the person you trust to take your dog out – and what to avoid.

Learn how to teach your dog to go to her bed on cue, and to park herself there voluntarily. So handy when you can’t bring her to the right spot yourself and when you don’t want to crate her!