Pet Behavior Glossary

Behavior glossary

Contents

Pet Behavior Glossary — Plain-English definitions of common pet behaviors and training terms, from zoomies and counter-surfing to resource guarding and separation anxiety. Understand what your pet is doing and why.

General guidance only — not a substitute for professional veterinary advice. When in doubt, call your vet.

About this glossary

Pets show many behaviors that can puzzle or worry owners. Understanding what a behavior means is the first step to responding well. This glossary defines common dog and cat behaviors and training terms in plain English. Some are normal and harmless, some are signs of stress, and a few need help from a vet or trainer. When a behavior is sudden, extreme, or dangerous, ask a professional.

Behavior and training terms A–Z

Barrier frustration: getting worked up or reactive when blocked by a fence, window, or leash from reaching something the pet wants.
Counter-surfing: a dog putting its paws on counters or tables to snatch food. Managed by keeping surfaces clear and rewarding four-paws-on-the-floor.
Crate training: teaching a pet to rest calmly in a crate, used as a safe den for house-training and travel — never as punishment.
Desensitization: slowly exposing a pet to a scary thing at a low level so it learns to stay calm, often paired with rewards.
Counter-conditioning: changing a pet's feeling about something from bad to good by pairing it with treats or play.
Fear aggression: growling, snapping, or biting that comes from fear rather than dominance. The pet is trying to make a scary thing go away.
Marking: leaving small amounts of urine on objects to claim territory, seen in both dogs and cats, often linked to stress or intact (unneutered) pets.

A sudden change in behavior can be a sign of pain or illness, not just a training issue. If your pet's behavior changes quickly — new aggression, hiding, house-soiling, or restlessness — see your vet first to rule out a medical cause.

Getting help

For behaviors that are dangerous, getting worse, or causing real stress for you or your pet — such as biting, severe separation anxiety, or intense resource guarding — work with a qualified force-free trainer or a veterinary behaviorist. Reward-based methods are safe and effective, while punishment often makes fear and aggression worse. Early help gives the best results.