Seaslug
Songster
I know that you are interested only in a single breed flock, but for anyone else who looks at this later, one should keep in mind that chickens can learn from one another. So for some of these "traits," such as ability to forage and predator awareness, one can have a single hen in the flock that serves this purpose and almost takes the roll of a rooster. They may not purposely call the rest of the flock to tasty snacks, but their reaction to having found something good to eat will alert the others to a food source. And as long as one of your birds has an eye out for predators, it mostly likely will the others to any threat. So one does not necessarily have to be concerned about if the breed you are interested in is not known to be excellent in these areas as they may be able to learn from their flock mates.