<human>:  Would a dog respond to bell before Grey seal?
<bot>: Yes, a dog would probably respond to a bell before a Grey seal. A Grey seal is a wild animal, while dogs have been domesticated for thousands of years. Grey seals have no ear flaps and their ears canals are filled with wax. Grey seals hear better underwater when their ears open like a valve. Dogs have sensitive ears that can hear as far as a quarter of mile away.