I am not quite sure if this is the right forum for this question, but I think it may be a question of chicken breed or genetics, so hopefully someone here may have an answer for me. I recently bought some day old sexed Sussex chicks from a breeder, who keeps Light Sussex and Gold Lace Orpingtons. Sadly only 2 of the 5 chicks survived, but they are now 2 months old and doing really well. However I have noticed some significant differences between them. Firstly, one has yellow legs, which I understand isn't pure Sussex, but can be a genetic 'throwback'. The other has the classic pale legs, but with feather stubs growing between her toes. Neither of these things bothers me, because I keep my girls as pets and for the eggs, not for showing. What I am curious to find out is why their combs are developing at such different rates. The yellow legged chick already has quite a prominent comb, whilst the pale legged chick barely has points showing - almost no comb at all. Is it normal for combs to develop at such different rates, could it be due to their different genetics, or could there be a problem with the pale legged chick's comb? It is quite visible in this picture - the chick on the right is the pale legged one. I am not at all worried about it - just curious to know. I had two chicks at the beginning of the year (who both turned out to be roos, so I didn't keep them) and their combs developed at roughly the same time, even though one was a Sussex and one a Red Sex Link, which is why I find it strange that these two are developing so differently, given that they are the same breed.