My little EE/Welsummer mix doesn't have beard and muffs either. Nor does she have a pea comb. It's a single comb like her daddy's. I had assumed that she would lay a brown egg when she got old enough because I keep hearing that the pea comb gene and the blue egg gene are so closely situated on the chromosome. But maybe not. Time will tell. The pictures of the second bird are a little blurry, but it looks like she has a single comb too. Am I right about that? Is her comb the same as the first bird's?
As far as the age of the hens, well, the rooster damage to the feathers makes a hen look older. I have two hens with rooster burn on their backs, and everyone thinks they are old hens. One is, one isn't. Nobody ever guesses that my oldest hen is old, because her feathers are perfect and she's very beautiful. Funny how that works.
What's up with the shelless eggs? How strange. Keep mixing that oyster shell into the food!