We have a new family member, a one year old Boston Terrier. He is very agile and loves to be at my side. I would like to try to sail with him, trusting he stays in the cockpit of which he does when the boat is on the trailer in my backyard. I am a trailer sailer. My neighbor swims and boats with a border collie that has an actual "canine pfd". My top deck is in good condition with some tiller rub scratches and the former owner gave it a couple of fore scratches with the tack bolt so some dog nails will not hurt my boat. I just wondered if anyone has tried a dog, small to medium size, as part of their crew in a Sunfish. PS: I am not sure what would happen as we pass some mallards, swans, or seagulls.