english: As geneticists would like you to think, perhaps the mother had the "bad mother" gene that caused her pups to be stressful, and then it was passed from generation to generation; it's all determined by genetics.
non_english: Genetik by vás rád presvedčil, že matka mala možno „gén zlej matky“, ktorý zapríčinil, že jej mláďatá boli viac vystresované a potom bol prenášaný z generácie na generáciu; všetko je podmienené genetikou.