A meat bird that I used to own called Whitey was very strong in her legs and could walk around with ease(most of the time ). She would have to lay down every now and then to catch her breath, mostly after she waddled/ran after the other girls. Eventually she got so huge that she had to be butchered for her own good, but gave me a good deal of eggs, most of them double yolkers and one triple yolker! It amazed me that a big, heavy bird like her could laid such a huge egg! Hers is the super big one!