Nightime aggressive sheltie mix
by Coastal S.
My 2 1/2 year old, super friendly sheltie, is suddenly snapping or lunging at my 88 year old mother. My sheltie sleeps in a corner on the couch. My mother must walk by that corner 5 or 6 times a night with no reaction. All of a sudden, the sheltie jumps over the arm to nip at my mother's hands. As soon as I say no, she backs off. During hte night my mother gets up 5 or 6 times to use the bathroom and must walk by the couch. No reaction from my dog. In the AM, when my mother gets up, no reaction from my dog. Last night and tonight, on one ocassion whne m mother walked by the couch, my dog lept over the back of the couch and lunged at my mother.
Why the sudden agreesion these past three weeks, and why only at night. And how does my dog decide this is a bathroom walkby and not reason to fear, but this is a going to bed walkby so I better be aggressive"?