golden puppy running

This can put too much stress on bones that are not yet fully calcified. After twelve months, do not start running too far, but gradually increase the distance.
Besides running, swimming is also a good sport. But it's best to go into the water with your dog. Be sure to dry your entire body, especially the inside of your ears, before going to bed to avoid infection. Some golden retrievers are allergic to salt, so be sure to flush the salt off their bodies with fresh water as soon as possible after swimming in the sea.