I got 2 RIRs from feed store right before Easter. One is large and laying normal sized eggs. The other is smaller, and isn't laying eggs every day yet. When she does, they are way smaller than her sister's. The smaller RIR is the same size as our 3 Barred Rock pullets that are one full month younger than her, and aren't laying yet. Is something wrong with my small RIR? Could it be worms or something making her not grow well and not lay well and have smaller eggs? When she eats, she seems to have a harder time swallowing larger bits. The bigger one will just gulp down a scrap, while the smaller one has to peck at it before swallowing it. All have access to grit. They free range in our fullly fenced backyard. Here's a picture through our screen door. The smaller one is in the top left of the picture. You can see compared to the barred rocks, she's the same size, and the other RIR is much bigger.