My little RIR hen is 5 months old and still the size of a pigeon. The barred rock who was hatched at the same time is fully hen-sized, and the gold sexlink who is actually 2 weeks younger is even larger. Little Lucy the Red did have cocciodosis a couple months ago, at that time they were all the same size - I treated all three, Lucy recovered and the other two stayed healthy. But Lucy never caught up in growth. She seems perfectly healthy, active, nicely feathered and the larger two don't pick on her - when they are eating she doesn't mind shoving between the larger hens to get her fair share. Still, she tends to mostly keep to herself, her combs are not as developed and her clucks are still chickish. Could cocciodosis have caused stunted growth? And what can I do to help her catch up?