Yesterday (Thursday) I picked up one of the California Greys, she was squaking at my feet pecking at my jeans begging for treats. As I was checking her over I felt her crop on her left chest instead of the right, she had food inside and otherwise felt normal. I checked a couple of the others incase I was mistaken and their crops were on right side. Checking her over some more I found a soft spongy tissue in area her crop should be that was as big as my index finger and a couple inches long. The skin above area wasn't discolored she wasn't fussing when I palpated it, so no pain. The lump didn't move, didn't feel like it contained fluid, no sign of any injury. I checked down her throat, and ran a q tip down but it came back clean. No breathing problems, no strange noises from chest. After the q tip she wasn't happy with me. I put her down and she settled her feathers back into order and attacked the mash with good appetite, drank water with no problem. Tail was up, coloring good, sassy as ever. Poo was fine. What would make her crop switch sides? The lump of tissue I felt possible tumor? I even checked the other girls to make sure I wasn't wrong, none of the others had the lump on either side. I thought it may have been muscle I hadn't noticed before. Any thoughts? I will be checking her everyday now.