Hey you have some pretty dogs. I'm Heather and my fiancé and I adopted a lab mix. We think she may have some put in her. She's only knee high and 6 months old but she's incredibly strong and extremely quick learner. We ride bikes and I'll be in front and fiancé @Charlesarthuriii will follow while holding her leash and he doesn't even have to peddle she just pulls him and the bike with ease. She loves swimming too! Be sure to follow us and thanks for the post! I look forward to reading more!