I have 4 white leghorns. They all look very small and their crops look huge. We weren't sure if it's normal or not. I felt of the buffs and they seem to have a similar size crop but they are bigger birds, so it's hard to tell. It does feel like at least three of the whites have big wads of something in their crops...but not sure if it's serious enough to require surgery. I would say that it's about 1/2 the size of a soft ball. Firm but squeezable. I did massage on them and they make weird squirting sounds inside the crop. I don't know much about chickens.......but how big is too big? Like, would these need to be dragging the ground big or is the size I stated above too big? Thanks for any help!! I love my girls!