Okay, so I'm still paranoid I'm gonna have to deal with this sour crop I keep hearing about. My girls have been loving their free range time and by dusk they are filled to the brim. Here's my question, though, are the crops "always" supposed to be completely empty by morning? I noticed one of my girls who was super full last night, still had a bit in her crop this morning, nothing like last night but it's definitely noticeable to the touch. Normal?