So i was at tractor supply today to see if they got any new chicks yet, and they had a straight run bin marked silver(blue) leghorn. Now to my understanding, those are two different varieties, the lady there said she had no idea. I grabbed six of the chicks, some of them had brownish colored down on the backs and they others a slatey color, so i got the ones that were a slate color. did i get blue leghorns? or is there just a bit of a varience in the chick colors of silver or what? real confused.