Our barnevelder hen has a saggy crop and a large lump in it. The lump is definitely grains, but feels gummy. If you squish it, it holds its shape. We've been massaging it and some of the outer seeds have come off. Is this sour crop? She seems fine in herself, same appetite, tail up, dust bathing, digging. She also moves her head in a strange way like she's trying to swallow.