I usually buy chick starter, but the feed store was all out of it. I ended up just getting chick starter/grower because I had to have some more food and couldn't drive all the way back out to the feed store. The back of the bag said the chick starter is 24% (protein?) and the chick starter/grower is 20%. My birds are 12 weeks and 16 weeks old. Will the starter/grower be ok? They don't seem to like it! They usually eat 2/3rd's of a 7 pound feeder everyday, but this new food (it's Dumor instead of a local made kind) they haven't hardly eaten any! What's up with that? I usually don't buy Dumor because it makes them poop more and their poop smells so much worse than when they eat the other brand, but in this case Dumor was better than nothing since the other was sold out.