Hello. I just got 2 four week old chicks today. I have 2 two-year old chickens already. Eventually I'd like to put them together. I need some help now, though, because I have never had chickens as young as 4 weeks. Can I ask a few questions? I currently have the chicks ina box inside the house. I'm thinking of letting them outside each day and then bringing them back in each night. I have a portable run that I could use for them during the day -- it's open on the bottom. Do I need to be really careful about what material is on the ground when I put them in that run? Right now the location I'm thinking of has some bark chips over soil, and there are a few weeds growing in between the bark. Is that going to be safe for them, or should I move it to the grass? How much do I need to observe them while they're in the outside run? (would it be safe to leave for an hour or so, or should I bring them back in the house first?) I don't currently have any feed in the box with them--Is that okay, or should I be providing food and water at night too? What age will it be safe to transfer them to the regular coop and keep them there at night? What would be the best way to introduce them to my older girls? I don't have an easy way of keeping them separate other than the portable run, and the portable run is too big to put inside of my regular coop and run. I can't let the chickens free range all over the yard as we have low fences and some poisonous plants on the other side, as well as a dog that I need to keep them safe from. Thank you so much for your help!!