For our new batch of chickens (currently ~9 weeks old) we installed a Beaktime automatic watering system (see photo below). However, not one of our nine chickens has tried out the new waterers. We've tried dipping the chickens' beaks into the waterers. The waterers are not too low or too high for the chickens (in fact they are at different heights because of a slight slope). How do we get the chickens to use the waterers? Or are we out of luck? (Note that we've put a regular jug of water in the coop, so the chickens do have access to water ... it's just that we'd prefer for them to use the automatic waterers, which stay a lot cleaner.) Any help would be much appreciated! Thanks!