i have some hand rearing mix left over from when i reared "my boys"

the reason i am wondering is because my gouldians that have nested on the floor hatched 3 babies, and over the last 3 days have lost 2, so want to put the remaining one and the hen in a box and makeshift nest to give it some sort of a chance!! just want to have hand rearing mix on hand in case the hen goes nuts...
thanks in advance
spanna