In 1975, my daughter Stephanie (aged nine), received her wish for a baby sister, who we (Nick and I) named Jennifer. A couple of days later, Jen and I came home from the hospital. At this time, we had two pets, Tiger the cat and Princess the dog. Nick said that we needed to introduce Jen to Princess so that she (Jen) wouldn't threaten her position in the hierarchy of the house. When we came into the living room, Nick set Jen, in her carrier, onto the floor so that Princess could meet her. Princess snuffed and sniffed her for about 15 minutes. From that moment on, Princess apparently considered Jen to be her pup. She would follow her around all over our property. The mother instinct, when it exists, is very powerful.