My Golden 300 Hybrid layers are going to be 16 weeks old on Monday the 20th and I'm about out of their start & grow and so, I think I only need a little more to get them through until I'm supposed to switch to layer feed and my TSC only sells 35+ lb bags of the feed, so I don't want to buy way more than I need... I thought I'd read to switch them over to layer feed at 18 weeks (but that might just be what I read on the bag) and I know in general, ducks start laying around 20 weeks old. I went ahead and just bought the layer feed but now I'm second guessing myself after reading about the problems the extra calcium could cause before egg production begins. I've been adding oats to the grower starter to cut the protein, will that work the same here to cut the calcium in a safe manner? Should I just get some more grower starter and mix it with the layer for a while? I've read both that you should switch them over a couple weeks before they start laying and then I've also read you shouldn't switch them until you see eggs. I'M SO CONFUSED!!!!! Any tips & experience would be so very appreciated. If it helps, I live in eastern Tennessee, so even though the temps are dropping, it doesn't get crazy cold here.