To measure width between pelvic bones it is easiest to hold her like a football, head back by your ribs, hold her legs between the fingers of your hand. Tip her bum up slightly and her pelvic bones will be the hard spots you feel. The number of fingers that fit between them will give you an idea of how close they are getting. With large fowl they need at least 2 fingers, three is probably closer.I was reading about being able to tell when a hen will start to lay eggs By how far apart her pelvic bones are? How do you measure? and how far apart will they be when she is about to start laying? Anyone know?
I tried it with 5 month old Wyandotte's and could just get 1 finger between their bones, the basques that are 3 weeks younger were over 2 fingers in width. The comb and wattle color is also required for laying.
another way of 
