I need your help/input. I feed Purina Flock Raiser to my mixed flock of day olds to 5+ year old chickens and geese. MIL went to the store today to go buy me some more, but went to a different feed store and brought home Homestead FastGrow http://www.homesteadfeeds.com/Poultry/fastgrow.html Is this safe for my mixed flock? Is it comparable to Flock Raiser? If not I need to know soon so I can get the right stuff tomorrow, I don't want to cause any damage to my geese or my chickens.