He's lonely.
Chickens are flock animals and need to have companions so he's treating your hand like another chick.
If you can get a couple more chicks of the same age he'll be happier and healthier over the long term.
Chickens are flock animals and need to have companions so he's treating your hand like another chick.
If you can get a couple more chicks of the same age he'll be happier and healthier over the long term.