we are planning on setting up a bigger waterer for our hens and plan to use chicken nipples. i don't know much about using them and have a few questions. first, how many do we need to set up? we currently only have 8 hens, but plan on having upwards of 30 in the future. also, are there styles or brands that are better than others? or sources that have good quality and good prices? and is there anything else i need to know before setting them up? thanks.