I had a single hatchling (chicken) and it definitely imprinted on me, would PEEPEEPEEP any time I wasn't with it. (Mama had abandoned the egg, I hatched it in the house, and tried to give chick back to her, she tried to kill it.) It helped a little to give it a mirror, and keep a radio on. After 3 days I found a feed store that had chicks, and brought home a friend. They became inseparable. Later they were moved out to a small coop next to main one where they could see the others and be integrated over time.
