my 6month old millie fleur pullet has a growth on her right chest. It is not her crop, which is filling and emptying without issue. This mass has now been growing about 10 days ago She was very sick when i took her to the avian vet. I’ve given her 7 days of IM antibiotics and secluded her mostly from the flock. She’s doing much better and is not nearly as weak, but the growth is growing. The vet had me bring her in for a possible open and drainage of an abscess versus mass. The growth is solid with no fluid, so rescheduled surgery for tomorrow under general anesthesia. The vet had an emergency and is not available. I’m trying to figure out what this could possibly be and am at a loss. Ideas?