How do I teach my dog to defend hisself?

Anonymous
My grandfather kicks my 1 year old puppy with his foot or his walker, and I’ve had enough so how do I teach my dog how to defend hisself when getting kicked or hit?

I’ve had enough and doing this the hard way, we won’t be putting my dog down when he does decide to defend hisself. This has been going on for almost a year, and to a point to where he’s kicked my dog down the stairs and he’s yelped and he’s hurt him where he was limping.
Updates:
25 d
My dog already barks and growls at him when he kicks or hits him
How do I teach my dog to defend hisself?
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