My dog killing animals by crushing them with his neck.. What dog instinct is this?

How exactly can your dog crush a grasshopper with his fur? Also, last time I checked, grasshoppers are insects, not animals.

Don't exactly know how any kind of "fur" could crush a grasshopper. No doubt the animal is using his weight to crush the grasshopper, and applying that force with his neck. Are you concerned for the grasshopper's well-being? You say he's trying to actually kill other dogs by pushing down on their neck. You didn't mention biting so....they must be smaller, timid dogs, or a big dog would have taught him the right way to kill. C'mon, he's just playing isn't he? Wanna change your wording from "do this to" to "play with"?

It is simply a dominance assertion, though his "technique" may well be a trait of his breed. In a dog fight it's a "take-down" move that may prove your the boss. Same way in play. Dry-humping, for example, is a dominance statement. I assume he's not aggressive fighting just play fighting.

Watch "Dog Whisperer"!

Last time I checked, grasshoppers were insects. Crushes them with the fur of his neck. He's either playing, or trying to show dominance by putting his neck on other dogs.

German Shepherds are very agressive dogs. They were outlawed in many cities back in the 70s when their popularity was at its height. The best thing you can do for your dog is show him that you are alpha.

You pronounced you "in no way see lions kill jackals or small antelopes for not something" -- precisely how lots time have you ever spent staring at lions interior the wild? Predators who might desire to seek for a residing might desire to make a earnings on a kill. meaning, they might desire to get extra energy from ingesting the prey than it took to seek it down and kill it. they might't have adequate funds to waste the capacity searching some thing they are unlikely to consume. that doesn't advise the lion does not have a prey force; with no prey force the lions might starve. canines have a similar prey force, in spite of the incontrovertible fact that it has not stepped forward for sure; human beings have manipulated canines' prey force by way of selective breeding, to get the habit they choose from the canines. Herding case in point, is that comparable prey force, the herding canines hunts yet stops short, without biting, catching and killing. Retrievers might desire to chase the birds and bring them back without biting down. searching canines, the human beings needed the canines to trap nutrition for the human beings, so it became needed for the canines to seek animals it does not consume. So, in a fashion, the intuition that makes the canines chase and kill small prey, became needed for the survival of the canines, because of the fact if it did not do what the human needed, it does not have been generic into human society. canines and lions stay in thoroughly different worlds. canines place self belief in human beings for their survival.

Bobbie L is correct. This is an act of domination. Put him on a leash and don't let him do it. Domination often leads to aggression and then you'll have a big problem.