Help with switching my juvinile pullets to nipple waterer

I would put out a small bucket of water so you know they're hydrated. Then remove the water and make sure the nipples are at eye level. When they get bored later, they'll start pecking at things and especially if the nipples are red/orange, they'll figure it out. Once one does, the rest will follow. You might want to put a small water container under the nipple to bring them there. As they explore the area they'll start pecking.

 

Take their beaks and put them against the nipples a few times. They will figure it out and as soon as one learns the others will follow.

 

Chickens always eat or drink if it is something different than they have like they are deprived. If they have food in front of them give them a slice of bread. They eat like they have not been fed in a week. If it rains and a puddle is found it like an oasis in the middle of a desert.