I do not know why there were multiple homes. My stepson adopted her and had her for 3 months, and it was too much with just buying a new home and having another dog. So I wanted to give her a permanant home. I know they owners before him only had her 2 months because he had cancer and I dont think they could deal with her bark, I believe they lived in a apartment. According to my stepson, there was no similar behavior with her and his other dog. It absolutely has to deal with food, so we are feeding them in separate rooms, but as soon as she shes him, even without food around, she goes after him, and it is only at night, all day they get a long fine playing.The other dog is a 14 year old Benji type, wouldnt hurt a fly.