1. Different goals: bunnies concentrate on the three F’s: frolicking, fucking and feeding on cabbages in Mr. MacGregor’s garden, while a big, mean German Shepherd wants to rip your face off.
2. Elicit different verbal reactions: a father, when he sees bunnies, will say to his small daughter, “Look! Bunnies!” On the other hand, when a big, mean German Shepherd runs up and starts sniffing the same small daughter, the father says, to her, “look out,” and “get back in the car until this dog goes away.” To the person walking the dog, with a leash in her hand that is for some reason not clipped to the dog’s collar despite the fact that she is walking her dog past a daycare center, the father says, “you know, that dog really should be on a leash, at the very least to avoid frightening children and parents even if you are so deluded that you believe it would never bite someone, which is, let’s face it, it’s job in life,” although the father is by this point so apoplectic with fury that what he says sounds more like, “OOGA-BOOGA leash!” Then, when safely out of range, he adds, “Moron!”
3. Different long term effects: after spying bunnies, that same father might feel slightly lighter and more playful for the rest of the day without remembering why, and might even think about turning on the old lava lamp when he gets home. In the case of the dog, so much adrenalin has been pumped into his system that the same man grows a thick layer of hair all over his body and grunts like Lon Chaney the day before full moon.