"Sporting Bird Flight Developer" safe chick food?

[foreseeme]

I have 50 chicks (25 broilers and 25 barred rock) - they are all about 2 and a half weeks old. I ran out of food yesterday, and told my wife to pick up "Chick starter Crumbles" As it turns out, the feed store gave her "Sporting Bird Flight Developer" (easy mistake for both of us - small label on big bag). My big concern - is it safe to feed to the small chicks? It is crumbles. The label says it is for "...growing gamebirds from the age of 8 weeks to release." Here is some of what is in it:
Crude Protien: 22%
Lysine: 1.15%
Methionine: .65%
Crude Fat: 3.9%
Crude Fiber: 6%
Calcium: 1.4%
Phossphorus: .7%
Salt: .65%

Since all are in the same brooder, they all suffer the "restriced diet" of broilers (the food gets taken out at night). I know calcium is not great for chicks, but it does not seem like a lot.
Since I was spooked about running out of food again, we got 4 50# bags. I would cut it with cracked corn, but I do not think the chicks could handle the cracked corn yet. So the question: is it OK to feed this to them?
For those who are pondering why I didn't just go get the right food: I live on Long Island, NY - there are two feed stores total on the island (one 2 hrs away, and one local). BOTH are out of starter feed, but promise to have some in "soon". And for those who follow such things: I pay about $19.00 a bag (cracked corn is about $12).
Thanks for the help and advice.

 

[Pet Duck Boy]

As long as it's not medicated for gamebirds, I'm sure it would be just fine. Also, chicks will always need some kind of calcium. 1.4 is typical for a starter/grower. Most layer feeds have maybe 3.0-4.5% calcium? The one I feed my duck has 4.2%.

 

[foreseeme]

The bag does not say "medicated" and the tag does not either, so I am concluding it is not medicated. Can small ckicks have too much protein in the food?