At ten days old, the chicks have their wing and tail feathers. Next, the feathers on their backs and necks grow in followed by belly and head feathers. They're very active and energetic at this stage. It's supposed to warm up this weekend and I hope to have them out in the lawn in a temporary enclosure so they can forage and scratch in the dirt. It will also give them a chance to meet the big chooks in a protected environment. Integrating new birds into an established flock should take place over a period of weeks if at all possible.
I'm a bit concerned about the smallest Sussex. She isn't keeping pace with the others in growth. She seems to be very lethargic at times and she's not as vigorous as the others. She's now the smallest chick, even smaller than the Campine (a medium breed). I am keeping watch over her but that's about all I can do for her. Hopefully she'll perk up soon.