I have two girls... I think that Lana is trying to establish her position in the family, and Lili is very jealous of her. She used to be an only dog in the house and now she has competition for our affection. I try to give them both enough love but I think that it is useless
they are just like kids. One is always going to be jelous of the other no matter what the parents try to do in order to fix it.