We put the big bottle with 1 nipple in the run about 11 days ago. No one was interested in it. I tapped it and tried to show them that water came out, they could have cared less. Finally I thought I should really SHOW them how this worked so I picked them up one at a time and tapped their beaks carefully on to the end of the nipple. Of my six pullets my one White Rock Snowball came back and tried on her own. She got it!!!!! Then I noticed Ginger one of the Golden Comets pecked at it a little and I think she understood. So now I am just hoping it is only a matter of time before the rest will follow along. I am so excited that they are using it. Who said chickens were not that smart? OK I did for about 11 days LOL!!!