Five broody hens raising a dozen chicks. Bobtail Bantam Cochin 

Thank you, greetings from Canada 😊

I haven’t noticed any correlation but I haven’t been studying them too closely either. These were raised by broody hen. I would have to put numbered leg bands on, take weekly pictures and keep track of the data. I might have to do this next time; it would be interesting to see if there is a correlation.