Kind of new at this. We currently have 5 chickens and my wife would like to order a surprise box of chicks. This contains from what I gather about 40 non sexed birds. We will only be keeping the hens and selling and/or trading the roos. It will contain assorted bird ranging from bantam to Turkey in size. Any recommendations in broader sizes for a diy project and what will be required to keep them warm in the evenings? I live in Maryland where currently the temps drop to mid 40s at night. Last time around we kept the chicks inside until feathered but the dust was too much and with that many birds may be unmanageable inside the house. Any help would be appreciated as this is a surprise so can't really discuss this with her..