My husband built a 3 gal. waterer using 3 nipples that he purchased on-line, we have 4 hens and 3 seem to be using the waterer and the other one we're not sure of (she has vision issues). We have had this in place for about 2 wks. and have noticed a drop in egg production. Any ideas on how to get them to use this waterer or should we just go back to the old style? We are giving supplemental light and were getting 3 eggs a day and now we get 1 if we're lucky.