my entire flock (52 birds mostly red-sex links) has always been skinny. (keel bones always feel very prominate) I always figured they just needed more time to grow and gain muscle. Well they are a year old now and still seem way too skinny. They barely make a meal for two people when slaughtered. I did notice a bit of blood in some poop yesterday, but when the doc did a fecal on a fresh sample today, she didnt see anything, no worms, no eggs, nothing unusual. I have had no deaths, no body seems unhealthy, eyes look good, feathers are a bit untidy, but some are molting, so not too worried. They eat 80lbs of layer crumbles/corn a week (the corn is a semi-recent addition to help put more weight on them, not working), No free range, but they do have a very large covered run where we have a grit pile and a protein block sitting out for them to peck at as they wish. Any ideas on what in the world I am dealing with? I was thinking about still doing a treatment with wazine, just in case, but I hate to just throw chemicals at them hoping for the best.