i have a black silkie hen just over a year old with a huge swollen squishy chest. I do not think it is an impacted crop because it is very soft. It is huge almost half the size of the hen. She has always been smaller than the other birds. I just noticed this today it seems warm to the touch but she seems to be eating and drinking and even laying eggs. I have had chickens my whole life and have never seen this before or know what todo.