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Fido stays faithful to the end

点击量:   时间:2019-03-08 08:02:00

MAN’S best friend can stay a friend for life, even after years of separation, according to biologists in Pennsylvania. William Carr and his colleagues at Beaver College in Glenside tested the memory of dogs who lived with one owner as puppies before being moved to new families. In some cases, nine years had elapsed since the dogs left their first owner. The animals spent significantly more time investigating the scent of their early owner rather than that of someone else who cared for the same type of dog. “Dogs evolved from wolves living with humans, which may account for their being especially responsive to their caretaker’s scent,