hi willkins,when they are fit,on hopper of beans,they will fly so high,you can hardly,see them,feed your old and young hopper beans,throw any crap you put in the water,its not needed,give gems matrix everyday,one teaspoon per bird daily beans and clear water. i g/tee you will never get yb sickness. you will save a fortune on all the crap that goes in the water,its rubbish.i would you feel jf your wife started doctoring all your meals,keep it simple.