Big Bird : Small Eggs

[Sebright18]

My Dorking is sat under 12 bantam eggs, in the middle are tiny bantam eggs and around them are medium bantam eggs. She has already cracked a small bantam egg even though it is in the middle and I am really worried if those 5 eggs get cracked, Its important to me that they dont. What shall i do?!

Many Thanks

 

[RhodeRunner]

In my experience heavy (5+pounds) large fowl tend to trample bantam eggs, and chicks. If one is already broken, don't be surprised if it happens to even more of them. And there is nothing like a rotten cracked egg to ruin a hatch! If these eggs are important to you, move them under a smaller hen, or put them in an incubator.
Otherwise, you are just going to have to take the risk if you leave these eggs under her. Making a more secure nest may help. You can do this by making a bowl out of straw, and keeping it smaller so all the eggs stay in place. Also, creating a nest where the hen can't jump onto the eggs should also help prevent her from breaking them.
If the chicks do hatch, you may want to consider brooding them yourself.