I don't believe there is such a thing as the perfect one breed. That being said, after much research I've found the best I could hope for in the Belgian Cuckoo Malines. We're a small family, so these birds do a great job here. They excel at just about everything except brooding. They can & do go broody, but their clumsiness usually breaks the eggs.
They're a good layer - about every other day & the meat is amazing! Docile as all get-go! You can mix different ages of these birds, no problem. Keep multiple roos too without any bloodshed. Fantastic foragers in warmer months & cold hardy to boot.
They all survived the -40 C winter here. Bielefelders are another good breed that I'm hatching out next week. They are said to be similar. The Malines is quite heavy with small wings in proportion to its body & can't fly, so they are very alert. I also have 2 dogs that guard them so they can free range 2 acres in bliss. 


