Hmm...Cape Cod! Down near Chatham, if I’m not mistaken!
You have The Egg & I in America? I had no idea!
My daughter and son-in-law have a farm where they grow organic produce and raise pastured sheep and chickens. They have many egg birds as well, roaming free. The yolks are practically orange (they even turn red when they eat scraps of red peppers).
She swears by duck fat. They hunt as well, so she’s regularly rendering duck fat which she uses the same as butter. It’s ok, but I like good old-fashioned butter.
Just about everything “they” tried to improve upon was disastrous. I remember when coffee was bad for us, as well as beef, butter, eggs, you name it. Best to ignore them.