Both my dogs seem to have a high prey drive. They are constantly on the look out for squirrels and chippies. Hannah scared a baby bunny to death by barking at it. Or maybe it was me yelling at Hannah that scared it. But she did not actually grab it, although she could have. She once flipped a dead baby squirrel in the air, but that was dead when she found it. My friends cockapoos were real hunters and have killed a number of small mammals including a couple pet hamsters. One would sit quietly, like a cat, for hours and then pounce on the prey.