
Resource guarding: what it is and what to do
Growling over food, toys or spaces? Understand resource guarding, what not to do and how to start safely.
Read moreReactive dogs overreact; aggressive dogs intend harm. Learn how the terms differ and why the distinction matters for treatment.

People often use 'reactive' and 'aggressive' interchangeably, but they describe different things, and the distinction guides treatment.
| Reactive | Aggressive | |
|---|---|---|
| Definition | Overreacts to a trigger (barking, lunging, spinning) | Behavior intended to threaten or harm |
| Example | Lunging at other dogs on leash | Biting or attacking |
| Driver | Frustration, fear or excitement | Fear, guarding, pain, learned behavior |
| Risk | Often lower, though it can escalate | Higher; needs a safety plan |
Reactivity can become aggression if it isn't addressed, and aggressive behavior sometimes starts as reactivity. Either way, working with a qualified professional and a veterinarian gives the best outlook. Start with our safety steps.
This article is general information, not veterinary, legal or professional training advice. If your dog has a health or safety concern, contact your veterinarian or a qualified behavior professional.

Growling over food, toys or spaces? Understand resource guarding, what not to do and how to start safely.
Read more
Shock collars, prong collars and 'dominance' techniques can increase fear and aggression. What veterinary behavior experts recommend instead.
Read more
How to protect children when a dog shows aggression: supervision, separation, teaching kids and when to rehome or seek help.
Read moreTell us what's happening. There's no judgment here. If you'd like, we'll pass your request to independent behavior professionals near you who work with aggression and reactivity. It's free and confidential on our end, and you're under no obligation.