Hi all! Just a bit nervous about sour crop. My girl Chichi was sitting on my leg when she adjusted her crop, like when they do that big “yawn.” I smelt a quick whiff of something sour, but then while holding her and trying to sniff her breath I smelt nothing. Her crop also doesn’t feel full but also isn’t squishy. I’m not sure what to do. 
Any help appreciated!

Any help appreciated!