I'm reading Storiey's guide now and the chart is from the book with the exception of 8-20 weeks the book recommends 7-20 weeks. I did read that 20% feed for breeding seasons if you are going to get the strongest ducklings. If my memory from my reading last evening serves me correct, David said to feed gamebird starter if you cannot find a duck feed.
I couldn't find duck feed specifically and use gamebird starter instead. The bag does say it's good to use for ducklings, so I figure it's ok. What had me a little worried at first was that this particular feed is 28% protein. My ducklings are now 5+ weeks old and I've continued to use this feed (I'm not going to waste a 50 lb. bag of feed that had only been 1/2 eaten after 2 weeks), supplementing their diet with peas, corn and lettuce and also letting them forage in the yard for at least an hour after I get home and before it gets dark. I've had no problems, so I'm not worried, but I am a little curious as to what the possible negative effects of too much protein is. The ducklings seem absolutely fine otherwise (knock on wood).
