How to Stop a Mastiff from Chasing Squirrels and Rabbits – Prey Drive Training That Works
Frequently Asked Questions
Why does my mastiff chase squirrels and rabbits so much?
It's genetic. Mastiffs were bred to patrol and intercept intruders, and small furry animals moving fast trigger that instinct. It's not about being hungry or aggressive – it's about moving objects in your dog's territory.
Can a mastiff be trained to ignore small animals?
Yes, but it takes consistent work and realistic expectations. You can train a reliable 'leave it' and 'let's go' that works most of the time, but the instinct never fully disappears. Management (good fence, no off-leash in unfenced areas) is part of the long-term plan.
Is it normal for a mastiff to bark at squirrels?
Very normal. That bark is the guardian warning – 'I see you, get out of my yard.' It's not aggression toward you, but if it becomes nonstop, it can be a sign of under-stimulation.
Do mastiffs have high prey drive?
Compared to terriers and sighthounds, no – but within the guardian group, mastiffs have moderate to high prey drive toward small animals. Bullmastiffs and English Mastiffs are the most reported, Neapolitan a bit less, Dogue de Bordeaux the least.
How do I stop my mastiff from pulling toward animals on walks?
Use a front-clip harness, keep the leash short, and practice the 180-turn method. Every time your dog pulls toward prey, you turn and walk the other way without a word. The dog learns that pulling stops forward movement.
What if my mastiff actually catches a squirrel?
If it's alive, call your dog away immediately with a high-value treat. Do not grab the dog – you could get bitten. If the squirrel is injured, contact a wildlife rehabilitator. Then work harder on management – your dog cannot be left alone in the yard.
Will neutering reduce my mastiff's prey drive?
Likely not. Prey drive is instinctual and largely unaffected by hormones. Neutering might reduce some roaming, but not the chase response.
Is it safe to let my mastiff chase squirrels if the yard is fenced?
Only if the fence is at least 6 feet tall, buried at the base, and has no gaps. Mastiffs are strong and can push through weak fences. And never let them see a squirrel on the other side of the fence – that's how they dig out.