As a Labrador swam by me out to sea his owner said I hope he doesn't meet a seal

There’s two strains of Labrador, often called the British and the American. Then British are the traditional goofy food-obsessed family dogs. The American are more working dogs - much more energetic than their British counterparts and less motivated by food than the opportunity to catch a ball.

I don't really know what you mean, American labs don't have any sort of genetics that tells them to stop eating. If they were in a room filled with food they would eat it all, only taking breaks to sleep. I have a lab mix and he shamelessly steals food from our young kids and off the kitchen counter as we eat in the very visible room next to it. He's eaten whole loaves of bread (multiple times), an entire pound of deep fried egg rolls, trays of cookies on and on and on. He's a good boy though.