I found this on the web for you.
Chicks to eight weeks old, need a 20% protein emu chick starter. Feeding a higher protein than this may cause problems with splayed legs! Feed free choice and several times per day. Chicks this age should not need more than 2 pounds per day of a good nutritionally balanced feed.
At around 8 weeks the chicks should be moved to a 20% Emu Grower and fed free choice. As they go through growth spurts, the amount they eat will vary but average out to around 2 pounds per day of a good nutritionally balanced feed. Some emu breeders move the birds to an 18% Grower feed at around 6 months. At fourteen months the birds that are not being used for breeding are sent to slaughter.
Yearling breeders (12 to 24 months) should get 16% or 18% emu maintenance feed and fed free choice.
During the "off-season" breeders are fed the same 16% emu maintenance feed as the yearlings. At the end of breeding season the emus will start to eat voraciously for about a month to 45 days. When breeding season ends varies from one hen to the next.
Hope this was helpful.