I have a dilemma, my 4 pullets are 14 weeks old and I'm about out of feed so I was hoping to buy a 25 lb bag of grower (medicated or unmedicated) but all my local feed stores only sell 50 lb bags of feed. Since I only have 4 chickens, 50 lbs will last me too long - way past when they will need layer feed. I shouldn't start them on layer feed yet though, right? Because the calcium could hurt them and it might not have the right percentage of protein? What should I do? The closest feed store sells organic Green Mountain feed for $25/50lb bag, is that a lot more expensive than other places?