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To be honest, I hope she does Wolfy one day! Obviously not enough to injure but enough to make him think "blimey, that hurt, I better not do that again!"
We went to puppy classes yes, but that wasn't an issue at the time, and so that topic never came up.
He's a titch, slightly smaller than a jack russell (which he's half of) so he'll never be big and bulky, Indi will always tower over him.
I've taken to shutting him in another room for 5 minutes or so when he goes completely OTT with his shenanigans as I'm fully aware that my shouting really isn't achieving anything!
Not sure im into the tapping him route, as a) I'm a softy and b) I couldn't bloody catch him to do it anyway.