I am hoping to make my own nipple waterer soon. I have a small cat litter bucket that is 2-3 gallons. The rectangular bottom is about 8" x 10". I currently have 12 chicks, ranging from 6-12 weeks. Based on these measurements, how many nipples should I put into the bottom of the bucket? Will one bucket be enough for my existing flock? I am planning to order from Neil, once I have my chicks in a row. Thanks, in advance, for the help.