I'm a bit confused. I just got home from the feed store, where I have been buying layer pellets for my three female ducks who are laying eggs.They have been laying since early October. The owner of the store made me feel like an idiot for even wanting to buy layer pellets for my girls. She strongly and rudely discouraged me from buying layer pellets saying that ducks easily get too much calcium and suffer from calcium deposits. She put a bag of grower mash on the counter and said that's what I should be feeding them, and when I said they were laying eggs, she said that they dont need the extra calcium to support their laying. This goes against everything I've read up on. So is there truth to what she said at all?