Welcome To BYCI have 5 foghorns I bought as chicks, 2 months old and they are all so much larger than the rest of my chickens. None of them get around well, walk a little and then sit, repeat... I was told the were good egg layers and that is why I bought them. Was I told bad info?? They find live long enough to give eggs??? We butchered one today and he was huge! His crop full of feed. I must say I'm a first time owners so I'm not sure what to do with them. Don't want them to have a bad life. Should I butcher them now??
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Do you have photos of your large birds? We may be able to help you with identification.
If they are Cornish Cross, instead of Leghorns, then they may need to be processed.