Short answer: it is usually not stubbornness. Terriers were bred for jobs that needed persistence, so a dog who keeps going is doing what the breed was made to do.
What the AKC says
The AKC describes terriers as feisty and energetic dogs developed for particular jobs, such as pursuing quarry underground or digging. It links the group with feisty persistence. Short-legged terriers are often called earthdogs.
What helps
Work with the persistence instead of against it. Keep sessions short and rewarding, and give your dog a legal outlet for the instinct, such as a digging spot or a search game. See digging up the yard and find the toy.
Do not
Do not punish a terrier for being determined. See management first for how to set up the home so the wrong choice is hard.
Get the right help
If your terrier is aggressive or cannot settle, ask a qualified reward-based trainer for help.
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Sources
Sources & care notes
Frequently asked questions
Why is my terrier so stubborn?
Usually it is not stubbornness. Terriers were bred for jobs that needed persistence, so they keep going.
How do I train a determined terrier?
Keep sessions short and rewarding, and give the instinct a legal outlet like a digging spot or a search game.
What should I not do?
Do not punish a terrier for being determined. Set the home up so the wrong choice is hard in the first place.
Does breed decide everything?
No. Breed shapes tendencies, but your individual dog and your training do the rest.
