My sister had a chicken that laid an occasional double yolk egg, her name was Matilda.
My sis had a flock of 8 game hens that she got from a friend. They didn't have a coop so much as an old dog kennel with a tarp on top. The chickens were really good about laying their eggs in the nest box and grabbing snacks of chicken feed occasionally, but they spent most of the day running the yard eating bugs and foraging most of their food. Their chosen perch for the night was on a branch next to the garage about 5' off the ground. One day my sisters friend shows up with a little white chicken. Seems he was hauling chickens for the processing plant and she escaped the cage and was running around loose. Just as he was about to leave, she came up to him and he picked her up. Being the softy that he was, he decided it was fate that the chicken survive and he took the chicken with him (he claims the manager said it was pretty small so it was ok). He brought it to my sister for her flock. And yes, it was a Cornish Cross and she named her Matilda and she grew in to a nice big butterball. It was funny to see that big white cornish cross running through the backyard with the sleak, skinny game hens, but she was right there with them doing everything they were doing, except fly to the roost every night. My sis was working evenings and everynight when she pulled into the driveway at 10:00, Matilda would pop out from under the bushes and run up to the car door and wait for her to get out. Sis would pick Matilda up, carry her over to the garage and set her on the roost. The other birds would make room for Matlida, then jockey for position next to her on the branch. She must have made a nice soft pillow to snuggle against.