I have 4 hens- 2 RIRs and 2 buff orps. Ruby, a RIR consistently has a pale comb. All the other hens combs are bright red. They have the same diet and free-range in the grass every day. Ruby behaves like all the others and appears healthy, no lice. I consistently get 3 eggs almost every day, sometimes 4. Should I be concerned about her pale comb? The only difference is that Ruby is the only one who gets broody.