A few of our 4-ish month old Ameraucanas have red combs; isn't this a sign that they should start laying anytime? We just switched them to the layer feed, with a little of the grower mixed in. Is this okay for them? They love the crumbles a lot more than they did the grower pellets, that's for sure. They just knocked the oyster shell I put in there all over the place (what a mess!), so I won't be doing that any time soon. They seem to be fine, but I wanted to make sure.