So, I touched on the jealousy that Buddy's been displaying since I've started babysitting my niece, but I really feel it's getting out of hand. This morning he tried to jump in my lap while I was holding her! He's started acting up, jumping when he knows he shouldn't, resource guarding (which has never been a problem before) and hiding when I ask him to go in his crate. And those are just a few little things off the top of my head.
I'm getting desperate here. Does anyone have any suggestions on getting him to accept her?