My chicks are almost 3 weeks and I'm wanting to buy a hanging waterer and feeder and I'm wondering what is the most practical size to get considering I'll have only 3 hens, and I think will want to hang both inside their future coop. Would a hanging 1 gallon waterer be adequate? 3 gallons seems like overkill! How about for a feeder? Any suggestions would be very appreciated!! Thank you!