Hi, my birds hatched 4 eggs. One of them hatched about three days after the other 3. They are now between 2 & 3 weeks old and all seem to be doing fine. Number 4 is a lot smaller than the other three. I am planning on selling them to a bird store next week that will begin hand feeding them. My question is, "If I take the three older ones and leave the smaller for the mother to keep feeding, will she do it or abandon it because the other three are gone?"