Originally Posted by Ed_The_Gypsy
I was told by a vet that dogs (he had one that attacked his own image) cannot understand that a mirror reflection is not another dog. Chimps understand, however.
They also have a problem with tape recorders. When I was 14 or 15 I made a tape of myself calling my dog, then waited until he came back inside. When I played the tape back from another room the poor dog never did figure that one out. He'd run to the room with the tape recorder, then come back and look at me (innocently reading a book) and then run back.
I can say though, that that was the meanest thing I ever did to him.