Five eggs set today

One of my chickens (Fancypants Johnson) is back on the nest for the third time this year, so I'm finally letting her hatch some eggs. Today we all went out to a farm where they raise bantam chickens and got 5 fertilized eggs. The chicks should hatch on around Sept. 3. The breeds are silkie and cochin frizzle, which are small, fluffy and very tame.  Do I really need more chickens? No -- I'll probably have to sell these.