I used to bred Buckeyes years back, when they had a resurge in popularity. Once again, they are extremely rare. Coincidence?
In theory, they are prefect birds for those of us whom live in cold environments. They have great temperaments, are excellent layers, develop quickly, are tasty, and make great moms. So, why wouldn't they be the best birds ever? Health problems. I got out of Buckeyes because I couldn't keep them alive. And so did a few other people that I know that worked with them.
You will see Buckeye articles claim everywhere that you need a high protein diet, to get your Buckeyes to reach their full potential. But, it doesn't say that about 15% of your chicks hearts and legs will give out a high protein diet. They rest of the babies will look and grow fantastically.
Then, you put together a breeding flock and they lay, lay, lay. And the hens go broody and boy are they great moms. Then they molt, and some of their hearts and legs start going out again. Within a year, about 50% of my Buckeyes were dead. And I didn't see a single sniffle, no coccidiosis, no mareks. It was their legs and their hearts.
Protein and genetics were the issue. I could have tinkered with protein, but I sold birds and people were coming back to me that were not keeping them on high protein diets, saying they were dying without any warning or cause. I couldn't handle that, so I got rid of them.
These day's I raise APA strains of Single and Rosecomb Rhode Island Reds, and absolutely love them. Great temperament, and health. We live in the snowbelt, so the Rosecombs were a very practical choice... but the Single Combed Reds and Rocks are doing fine too. If you want another winter hardy breed without much fuss, you can look into the Chanteclers. I bred them for a number of years, and they were amazing birds. I sold my flock when I moved, as I couldn't offer them free-range housing anymore... and they do bicker in small cages. Chanteclers need space, but a great meat/egg birds, and they grow really fast without the health problems.