@sarajane - if the bird is smaller than the same age flock mates, I don't think it is a roo.... could be wrong, but generally the roos are bigger almost immediately.
As for not wanting chicks, your hens probably won't go broody until next spring, and unless a hen goes broody and sits on the eggs for more than 24 hours, you won't have chicks. Even if she does goes broody, and BO are a breed that does go broody, if you keep removing the eggs, you will not have chicks.
To get chicks you need a active roo + a broody hen or incubator..... until fertilized eggs are exposed to heat for more than 24 hours, they are in a state of suspension.
It takes a keen eye to see a fertilized egg, they taste no different. People eat them unawares all the time.