I got 8 chicks last Tuesday and I want to get two more tomorrow. The ones last week were already a few days old when I got them because they had gotten their last shipment on the previous Saturday but I'm not sure of the exact age. The speckled sussex are the biggest and the Welsummers started out the same size as the Buff Orpingtons but the BO's have grown a lot faster than the Wellies. Anyway, I want to add an Australorp and a Barred Rock, the feed store is getting a new shipment tomorrow. Can I still add them?