I had a chocolate lab. She was a master at escaping from her kennel. Especially when she was in heat.
She climbed a 6 foot chain link enclosure. I saw her go over the top and ran out to catch her. Too late she was already bred.
When I registered the litters there was a place to check if they were black, chocolate, or golden. mine were all chocolate except 2 black the last litter and that litter was 12 females and 1 male.
Fortunately the neighbors dog was a registered lab so I made a bunch of money selling pups. 11 the first litter and 13 the second and last time before I had her fixed. I took my wife to Hawaii after selling the last litter. I got $300 a pup and sold them all quickly.