I have two broody female ducks. They have been sharing 1 nest that now only consists of 2 eggs. they started off with about 8 and gradually killed off the eggs. I have purchased 4 ducklings in the off chance 1 of them may latch on to them. What is the best way to introduce them tho the ducklings. And would i be better removing the 2 eggs? Or separating the females up and giving them 2 ducklings each ?