I have been checking my chickens for weight so I can start butchering some and I am shocked at how thin they are. They have food/water all the time. The older hens are carrying plenty of weight but the younger ones are skinny. They have 2 feeders and I never see anyone guarding the feeders. My older hens have a very full crop at night when they go to roost but the younger ones never have a full crop. Is there anything I can do to get them to eat more?