We have ~30 Red Rangers that are about 10 weeks old. We have had two that developed what we believe is "fat deposition", extremely large chest/breast area that literally swings when they walk. The first one died shortly after developing this, the second one we just noticed a few days ago. I have segregated it from the others and am wondering if this can be treated somehow. We are more of the "pet chicken" types than flock managers, so I'm not looking to put it down unless there's no alternative. At the moment it's in a large crate/kennel in the chicken yard, in the shade, with only water. Any suggestions appreciated. FWIW, we have been feeding them meat bird crumble that is ~21% protein. We did the same thing last year with the same breed and had no issues.