[SOUND] [MUSIC] So when we consider designing perfect environments and management systems. We have to realize that a lot of our animals, before they were domesticated, and even as they're domesticated, are prey animals. So some of the response we're going to see, they, they might treat us as predators. So we have to design systems with that in mind. So we're just going to see here how our sheep here respond to a dog. And this dog, they're used to each other. But in some way the sheep are still going to see this as a predator. So the dog's not going to harm the sheep at all. They're familiar with each other, but look, now the sheep are detecting him. You see some of the, some of the sheep start to recognize that there's a, a predator in the area. The dog's not acting at all like a predator, and that's because he knows them very well. But you can see, so the sheep, they're not afraid, but they're aware that a predator is present. So they're beginning to gather together. They were all individually spread and now they're starting to group up, because there's protection. At the moment, this, this isn't stress, there's no fear taking place. The normal prey behaviors are beginning to take place. So see that the sheep are now gathering together. And the leaders of the flock will be watching the potential predator. So not all of the sheep are looking. Some of them are just looking over the shoulders. And they tend to be the leaders in the flock. But again, that's not fear. This isn't stressful. This is just the expression of normal predator behavior. So as we design our management systems we have to take into consideration what we know is normal behavior for these animals. So bit by bit, just nice and slowly they're just gathering into a group. There's safety in numbers. Again, some of the sheep continue to graze. They're not even, they're not even worried. Now we have a sheep that's coming forward a little bit. So that would be one of the more dominant sheep. Maybe who could take, if that was a real predator, would take a protective stance. And you'll see the the lambs and the females will often go out to the back. And if there was a ram out there, the ram would probably place itself near the front. And this is a protective, this is a population homeostasis, this is a normal response to stress. They would have, not have high circulating catacolomines, they would not have high circulating cortisol at the moment. This is all within normal behavior. So that's why we can use dogs to move animals. Not to create fear in them. But actually to take into consideration they're prey, predator behavior to move them and to optimize our management system. And you'll see as the potential predator gets a little bit closer the sheep will group. Again, these, these sheep aren't even looking. One or two are and now, if this was a sheepdog we could move them. So, we could use this dog to move the sheep where we want. But to do it nice and gently. Taking into consideration their well being. But if we needed to handle them or give them medication, or examine them for disease. Then we could, we can use a dog understanding their prey/predator tendencies. >> That was Dr. Denny French and his faithful, his faithful dog. Not a predator at all. Big friendly lump called Tanner. [MUSIC]