Hi everyone. One of my pullets has a large croup that feels like it is full of small pebbles/gravel. I searched for impacted/sour croup but have not seen any mention of a gravely feeling. It is very heavy. She seems well otherwise and is still trying to eat. I withheld food for 24 hours and still the same. Does anyone have any ides why gravel??? Do some birds just fill up on dirt/rocks instead of food. They go out to free range but not much more than dirt out here in the desert right now. The other 13 are fine.