Ok-- I made a B00-Boo. I THOUGHT I was buying "Flock Grower and Develope 15% r" Like I had been feeding my geese (6 weeks old)---that I had been getting from Tractor Supply and been feeding them. So I have another whole bag of " Flock Starter "20% protein. I am feeding my new ducklings some from the other bag and realised it after I openedn the new bag. -- Ditz moment. So since I was thinking of mixing my own feed anyway. My hubby suggested I mix it with corn or mixed grains I can get from TS protein about 6-8% and feed the geese proportionatly.Like 2/3 to 1/3. Would this be ok? until the bag is gone? Or should I throw it away? I HATE waste. But I do know my book says you should not feed that . ?