As far as I know, as many as you want. Just put in 10 of however many you'd like and then up the "quantity". I only ordered 4 chicks from these guys and they sent me 10, so that was pretty cool!
Bought chicks from Bresse Farms and they threw in mystery chicks with my order. I specifically ordered Swedish Flowers, but they put extra mysteries in there. This chick right here has grown faster than all of the ones that came with the order, the order had 10. The comb is bigger as well. I...