You're doing a great job, and it's obvious from the care you're taking with your new chicks that you really love them!
They will be fine with your present set-up for a little longer. But you can make them very happy if you could rig up a temporary run outside. If the temperature is mild, you could let the older ones out to run and fly. If you get a day where it's 70, no wind chill, and sunny, they would be fine, and you'd have a lot of enjoyment watching their joyful antics. At first they'll need a shelter to scoot into to cuddle together if they need some warmth, and I usually leave the pet carrier in the pen with them. They also will be timid of the open space, so will be ducking into the shelter often at first.
From the pics, the older ones look fully feathered. If they still have down on their backs, they'll still need a heat source. In another week, they should be fully decked out in feathers. You're lucky the different ages get along. And also lucky you won't have to deal with integrating them into an established flock. That's a tense business!
They will be fine with your present set-up for a little longer. But you can make them very happy if you could rig up a temporary run outside. If the temperature is mild, you could let the older ones out to run and fly. If you get a day where it's 70, no wind chill, and sunny, they would be fine, and you'd have a lot of enjoyment watching their joyful antics. At first they'll need a shelter to scoot into to cuddle together if they need some warmth, and I usually leave the pet carrier in the pen with them. They also will be timid of the open space, so will be ducking into the shelter often at first.
From the pics, the older ones look fully feathered. If they still have down on their backs, they'll still need a heat source. In another week, they should be fully decked out in feathers. You're lucky the different ages get along. And also lucky you won't have to deal with integrating them into an established flock. That's a tense business!