Yep! The food I feed from Poulin Grain is also a grower/breeder and the chicks do really well on it.
You can also order a bag of Mazuri directly from Mazuri, but it's really expensive to do.
Try this:
https://www.chewy.com/kalmbach-feeds-20-grower-breeder/dp/244661
Kalmbach is a good brand and I know lots of people that have emus feed it :)