Dogs, particularly pups, use their jaws to discover the world: thus seeking for and trying to pick up sticks is normal. Nature's dog toy is a stick. They come in various sizes, so no matter how big your dog is, they may search for and discover the ideal ''stick'' for their tastes. Your dog may seek out a stick of a similar size on every excursion. Typically, it's the size; dogs prefer—whether it's huge, hardly there, or something in between feels best in their mouth in terms of circumference, weight, and length.
These are the ones that are many times the size of the pup, while some choose to carry about a smaller version that you may not realize until you catch a glance of them lugging their newfound prize.