I have Zebra finches and my pair hatched a clutch of 3 eggs.. One chick was hanging from the nest by it's leg last Thu and I popped it back in but two days in a row I got up in the morning and found it laying frozen on the floor of the cage and Mom and Pop don't want a thing to do with it.

So I have since began hand feeding little wing and she (I think) doing ok (I think).. trouble is I have no idea how old this little one is and no clue what to do about weaning.
I got up this morning to find one of the bigger chicks gone, no idea why just laying on the floor with Mamma going nuts above it. I'm so worried I'm hurting these little birdies somehow.
I have raging flue right now.. BUT, I am boiling everything that touches baby, I'm wearing latex free gloves to feed. Have baby in my sprouting box with a heat pad under.. just need some help please?