Last night we went to the local fair and looked at all the different poultry on display. We have six different breeds of hens at home who are about 6 months old and the same breeds at the fair were much larger. I don't have bantam chickens, they have been fed normally and lay well, but their size was nothing like the fair chickens. Will my chickens keep growing until they are a year old or are they the size they're going to be forever? And is it because they came from a feed store who sells hatchery chickens versus buying from a breeder?