I have a cockateil pair which had its 4th clutch and had 2 chicks hatched. The elder chick was health and is now 12 days old. The parent stopped feeding the chick since yesterday and I pulled it from the nestbox today and started on formulae. I saw that the chick is not the size of a 12 days old chick and its head keeps drooping . Sometimes its not able to stand by self .Can anyone kindly help on what I should do to help out the chick.