I have watering cups installed in a PVC pipe for my chickens. If I push on the yellow plastic water come out and fills the cup. Then later when I come back the chickens have drank all the water in the cup. I took out the old waterer for a day and then put it back in that night to make sure they had water. They all swarmed it like they were really thirsty. I did this for three days and today I got the same result. The water is not going down in the reservoir much at all. Has anyone else had any problems with the chickens learning to operate the drinking cups?