I’ve noticed the same behaviour with my Jack Russell. I don’t think she has any allergies.. at least she seems fine by all matters.. and the last routine check at the vets was only a couple of weeks ago.
She doesn’t do it out of stress either.. In fact she usually starts when she’s lying happily on the sofa feeling relaxed..
So I suppose it’s just a bad habit of some sort.. As Cincy'sMom said.. like people chew their fingernails.
-Varga
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