Currently I have a breeding flock of BBS ameraucana and muscovy ducks. Currently I am feeding the ducks Purina flock raiser and my ameraucana Purina Laying pellets. I have read that the laying pellets can be bad for the roosters due to the calcium levels. I was thinking of switching all the chickens to flock raiser. Any thoughts? Anyone have a different feeding regiment. Is the 20% too high for them?