There have been posts quite a few times both here and on the chicken boards about people using these types of things to supply water for their birds. Is anyone aware offhand of any studies that have been done regarding the amount of water consumed per bird with different types of watering systems? I'm thinking it would be pretty hard to measure with the automatic watering systems. It would mean adding some sort of device to measure total water usage & averaging out per bird, and accounting for any drips OR doing the same on a per cage basis. This would take some serious financial investment. How about some "on the ground" observations with rabbit & hamster bottles? How much do your birds go through, on average? Have you compared this to watering with a more traditional system? The reason I ask is because my Rabbit knows how to drink from a rabbit bottle. However, he consumes VERY little water with one of these. The former owners found out by accident one day that he drank several times as much a day when provided with a bowl. I've continued to supply a bowl and no longer even give him the rabbit bottle. I know that birds & rabbits are very different (duh) and that we can't generalize from one species to the other. However, it did make me wonder if anyone has observed anything similar. I know that with people chronic low levels of dehydration can create a variety of health issues without us even being aware we are dehydrated. It would make sense that the same would hold true for other animals. It would be interesting to see a comparison of how much water is used with automatic nipple type watering systems versus automatic cup style watering systems (which would also have to account for loss due to evaporation).