BP can be defensive for various reasons those are mainly due to stress (over handling, husbandry issues, shed etc)
They can be stressed following shipping but if your husbandry is spot it should not last more than a day or two.
As mentioned younger individuals will be defensive but will grow out of it as they grow.
So bottom line make sure your husbandry is optimal, do not handle your animal until it eats with consistency, offer appropriately sized meals and remember that those are wild animals and that expectations should be different than those you would have with a dog.
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