Here is the breakdown for Storey's suggestions on protein levels:
0-2 weeks 18-20%
2-7 weeks 16-18%
7-20 weeks 15-16%
Holding period when birds are not producing 12-14%
3 weeks prior to and during Laying 16%
It also states that if you want to feed waterfowl starter that has more than 16% protein you just gradually add oats till you reach the right protein levels.
So yes, you can feed the whole flock a flock raiser or starter feed. If they require different protein levels try to find a good medium. Metzer Farms has a calculator on their website that can help you figure out the ratios.
(Storey's Guide to Raising Ducks is a great book full of lots of information. I highly recommend it.)
0-2 weeks 18-20%
2-7 weeks 16-18%
7-20 weeks 15-16%
Holding period when birds are not producing 12-14%
3 weeks prior to and during Laying 16%
It also states that if you want to feed waterfowl starter that has more than 16% protein you just gradually add oats till you reach the right protein levels.
So yes, you can feed the whole flock a flock raiser or starter feed. If they require different protein levels try to find a good medium. Metzer Farms has a calculator on their website that can help you figure out the ratios.
(Storey's Guide to Raising Ducks is a great book full of lots of information. I highly recommend it.)