> But what about the "throw the item 40m so I can run after it?" Why would that have a purpose? Why is the appetite for doing this insatiable, to the point wher

> But what about the "throw the item 40m so I can run after it?" Why would that have a purpose? Why is the appetite for doing this insatiable, to the point where you are advised not to do it with small puppies who might hurt their hip development? A combination of chase instinct (when going forward) and resource guarding (when grabbing it and running back). Note that some dogs would do that, but skip the part where they return the toy back to the owner and just spend some quality one on one time with their prey.