I want to give as realistic and thorough an assessment of these birds as possible because it's far too easy to fall in love with their beauty and wonderful personalities, and miss the few potential 'negatives' about the breed. I acquired all of my birds via hatching eggs purchased and shipped from two separate breeders. My hatch rates were good, especially considering the effects of shipping, but from the beginning I noticed that chicks failed to hatch after lockdown in spite of having developed well up until that point in incubation.
All chicks are adorable, but Bielefelder chicks are especially easy to keep. They were so quiet and content that I would check on them multiple times per day out of fear that they'd died or something. And whereas many breeds of chick scatter in panic when you reach into the brooder, the Bielefelder chicks wouldn't hesitate from the beginning to approach my hand, accept affection, and peep happily or rest quietly when handled. That said, they are also eating machines and most certainly ate more than other breeds I've raised. And that heavier feed consumption continued throughout their development and even into adulthood. Now that my birds are mature they don't eat significantly more than some of my other adult breeds, but it would be wrong to classify Bielefelders as feed efficient.
The personalities of these birds are some of the best I've encountered, especially among the males. At one point I had six Bielefelder cockerels and there wasn't an aggressive or flighty one in the bunch. True, a couple were less friendly and more nervous than others during adolescence, but not one of them could ever have been considered aggressive to humans or other chickens. Two of my favorite roosters are Bielefelders and don't hesitate to hop up onto my lap to be cuddled and pet, and will even fall asleep on my lap while I stroke their backs. They are very tolerant of other roosters, including other breeds of roosters, and while very friendly still know how to assert themselves and hold their status as regal leaders of the flock. And when it comes to taking care of the girls, these boys are real gentlemen. I call one of my Bielefelder roosters "the great uniter of my flocks" because he calls forth even the shy and nervous hens to receive treats, protecting them from more aggressive hens, and manages to bring multiple flocks together to live in harmony. My boys also work in tandem to protect the hens and pullets from any potential threats, with one of them standing guard while the other herds the girls to safety. My mature roosters weigh between 9 and 11 lbs each.
The hens, in my experience, have more diverse personalities than the roosters. Most seem to be exceptionally affectionate to the point of almost being overly trusting and constantly underfoot. They love to be lap chickens and are rarely nervous, and while some of my girls are very quiet, others are downright chatty. And although some more assertive breeds may pick on these gentle giants, I have seen my Bielefelder girls stand up to some of those bullies in order to defend themselves and even to defend my little Silkies. They form strong friendship bonds both within their own breed and with other breeds. In fact, the only negative thing about the hens specifically is that they take a long time, in my experience, to reach point of lay. My own birds didn't begin laying until 44 weeks of age, and while their eggs from the beginning were large to X-large in size, they also tend to be torpedo shaped with low hatching rates in spite of high fertility. Just as with those shipped eggs I received, many of the eggs begin to develop and then fizzle out by day 18 of incubation. I now plan to try hatching some under a broody hen to see if I get better results. My mature hens weight between 6.5 and 8.5 lbs each.
My number one warning about this breed is that they simply do not handle high temperatures, and especially high temperatures with high humidity, well at all. This breed seems to retain more far more body fat than other breeds I've owned and suffer horribly as the temperature increases. I live in the desert southwest and had to resort to extraordinary measures to care for my Bielefelders last summer, including providing them with air conditioning. I'm now working towards improving their heat tolerance, but it will be a long-term project and will undoubtedly require a great deal of time and patience. If you live in a cooler, more temperate environment though, Bielefelders truly are a wonderful dual-purpose breed that does very well free-ranging on fresh greens to counteract some of the cost of feed. Their meat tastes fantastic and is very juicy, with plenty of fat to render for roasting or for cooking other foods. I've no regrets about acquiring them, even if they do require a bit more attention and care than my other breeds during the summer. Their outstanding personalities make it worth it to me to keep them in my flock.