Hi, I'm Kathy. I have a pair of pekins . 1 hen and 1 drake, there's nothing wrong with them I don't think. They are 3 months old and they were about the same size until about 2 weeks ago and then my drake just had a massive growth spurt and he's a lot bigger than the hen. I would estimate that he's close to two to three pounds heavier than her and looks a lot bigger. Will she catch up with him or are they both on a normal growth rate. I will go and get a picture of them and post it next.