Have him become her sole food giver while he is home. He is the guy that gives breakfast and dinner. He also becomes a treat machine. Tell him not to look or talk to her just throw the treat in her general direction. Let her come to him. Get some yummy treats that only he gives her. Meat would be a good idea. I get those turkey strips at the market and cook and put into small zip locks for later use. Make sure to freeze any that you can't use in three days. The way to a dogs heart is through their stomachs.