hi, i have 4 hens, 1 leghorn, & 3 cornish mixes all almost 2yrs.old, i was getting eggs from all the girls, the cornish mixes give me brown eggs, & the leghorn gives white, now, i go out i get a really light colored brown egg?? i havnt seen any white eggs for a month now, & i still get my brown eggs, so, now im wondering, is the leghorn giving this light brown colored egg?? she is mating with a RIR roo. is this possible?