I have a flock of 5 birds and initially got chicken watering cups, which they took to quickly. Upon further research, I realized that the cups will freeze when the temperature drops (duh) so I picked up some horizontal nipples and added a bucket with horizontal nipples into my run. The chickens have no interest in using them. I have put pieces of cracked corn on the little ledges and they know that water comes out, but they still prefer the cups (I don't blame them). I don't want to remove the cups from the run unless it's completely necessary. This obviously isn't a problem until it starts freezing, but I worry that when it does freeze, the birds will be so used to using the cups that they won't realize that water comes from the nipples and will be "without" water until I go back out and do some education. Is there a way to work this out with them?