Help with broody odds please.

[kittyacid]

I have 4 girls that will be a year old next month. The silkie went broody in March. The others are a BO, Cochin and a bantam Brahma. I want to add 6 chicks this summer and prefer to use a broody. What do you think the odds are of one of these girls going broody over the summer? Thanks!

 

[EastinChickens]

The silkie will probably be the most likely to go broody, but the cochin and the orpington are also very broody breeds.