I just realized today that the feed store gave me layer feed last time I went instead of grower. I have 6-8 week chicks and they've been eating it for almos a week. Will it have done them any permanent harm in that amount of time? Anything I should watch for? Not sure what the symptoms of calcium overload are... Also, they can't take back feed in their warehouse (even unopened) so they told me to keep the two bags of layer and gave me two of the right bags. I don't know of any sort of chicken rescues around here or I'd just donate it. If I put them in our freezer will they keep okay for a few monhs until the chicks start laying? It's milled by the feed store and they make small batches, so it's pretty fresh.