Last time I bought feed I went to a different feed store and I bought 18% Grower feed. I went back this time b/c my chickens really loved their feed, and I asked for the same thing but didn't notice until we got home late tonight that it is 21% Starter instead. My chickens are 7 weeks, 9 weeks, and 14 weeks old. Would you feed it to them anyway, or would you return it for Grower? The feed store is about 40 minutes from here if that makes any difference to what you would do. I'm still new to all of this, so I'm not sure what, if any, harm it would do to feed it to my chickens. Thanks!