All four of my chickens are at about 20 weeks old and their current pullet feed is almost gone. Two of them are cockerels so I know I shouldn't be giving them all layers feed (none of my chickens have started laying anyway). I did some research and lots of people are recommending the Purina Flock Raiser. However they don't seem to sell it in Australia and the ones available on eBay don't ship here either. I can't keep them on pullet feed forever so I need a new alternative to the Purina. Any help with this matter would be greatly appreciated, especially if it's Australia specific.