I'm new to dog training but learned one lesson that luckily turned out okay. I like to take my 7 month old lab out for mtn bike rides. Last week, due to her age, and warm temperatures, I only went 3 miles. At the end of the trail, there is a large pond. I threw the dummie twice into the water and she did wonderfully, so I stopped (finish on success). Anyway, she had her leash on, and i realized i had dropped my keys. I went back to the pond entrance, and she ran into the water for one last dip. I wasn't too worried, but than she saw the swans, which normally haven't attracted her. She started swimming after them. Now I was worried, with the leash and her trying to swim into the middle of the pond. I was in the water with my shoes on, when she realized that she was getting tired. she stopped on a reed pile, rested and came back. luckily the long lead (8 ft) did not get caught.. I love that dog, I would have been a mess if something happened to her. Just in case another newbie is out there, be careful, these dogs really love the water.