Geez Ian, what do you guys do, run a kennel?
One dog is enough for me. My dog definitely has lab in her, but she won't go in the water past a foot deep. She fell off the dock when she was a pup and she's been afraid to go in deep water since then. She did walk off the back of my boat one time. We were in about 5' water and it was clear so you could see the bottom. She hopped down on the swim platform and started to head for shore. She went at least a foot under water which dogs don't normally do. I had to jump in to lift her back onto the swim platform.