I haven't had a lot of hummers until recently. This is at my summer home and this is my problem. I spend three nights and four days there each week. Well last week they drained 9 feeders, these are 8 oz. saucer feeders. So we filled them and they are now eating about 8 oz. per day. Why did they drink so much in four days and then slow down? I have babies and I saw 10 at one feeder this weekend. Which brings up another question the babies were always feeding on the west feeder and then they moved to the North feeder? Same food and feeder.