Our 5 month blrw died today.  After looking her over I found a tumor under her wing as well as another one on her back of similar size.  I sliced it open to make sure that it wasn't an abscess.  We've had issues with a few of the flock mates involving their crops since they all experienced a respiratory issue in the spring.  Other than the tumors there were no other signs of illness after I inspected all the organs.  This morning she was slow to come out of the coop, but hadn't shown any signs earlier.