Surrogate momma day two and beyond

With Mary accepting the chicks and the chicks accepting her, it made raising them relatively easy...not need for a chick cage, or a heat lamp. When they needed warmth they went under Mary. The only thing we've noticed is that the chicks are afraid of us, and since we didn't imprint on them like we did with the others, they don't respond to our whistles. With the others, they became used to us and knew that our whistles meant to come and receive a treat. Also, we haven't named them. Seems odd. I'm sure we'll name them soon, especially since they are starting to become distinguished in their looks and personalities.