I'm picking up my started birds on Saturday! They will be 4-5 months old, from Meyer Hatchery. 3 RIRs and 3 Golden Buffs. The coop and run are built and predator proofed, first aid kit is stocked, I'll buy food and bedding when I pick them up. Cardboard carriers are built and ready to go. Any other last minute things I should do? Their coop and run are permanent and connected, do I just lock them in and they will be chickens, or is there a process on the day I bring them home? I have a vital pak for the first couple of days.