Again I can't get your photos to enlarge...but if they have beige pink legs and those spots stay in the maturing feathers, they are Speckled Sussex.
I've had some transitional spots show up in my Welsummers, but they will grow out as the more mature feathers come in...and usually Welsummers...
I agree...I can't get your photo to enlarge to see closely, but they look like Brown Leghorn or possibly Welsummer or even Speckled Sussex. If they are smaller than the average chick, they may even be OEGB.
Lady of McCamley