hi,i feed my birds beans,beans and more beans.hormform,and groats as tit bits.you will never get yb sickness,with beans.write to the bhw,put a couple of quid in the letter for postage.it will be the best money you will ever spend.all roads lead to rome,what works for me might not work for others,but this system is for fanciers with little time,follow the system to the letter.you will save a fortune on the crap you put in the drinkers. hope the info helps pdordin ;D