How many nipples would be ideal for 4 chickens? I am thinking I'll just do one for each since our summers are hot, unless you think that's overkill.
2 should be quite sufficient but feel free to add more... I have 10 nipples for about 100 birds and there is never a line to get water... In fact I generally only see one or two drinking at a time, it's never a mad rush since it's there 24/7...
I'm hoping to remove the other waterer in the next couple days.
Nipples are a convenience for us, if you provide them a alternative some won't bother with the nipples... Remove the other water source and the others will start to use the nipples...