I have always had RIR but fir some reason I have 1 hen who is just not putting the weight anymore. I weighed her and she is 2.6 lbs and that she seems so small for rir? Is it really true RIR should be no left than 6 lbs for hen? She I deworm her just in case? She's eats like a pig free ranges all day but just doesn't weight anything. The largest rir is 3.4 lbs. Still small I would thing. Does anyone have thoughts on this?