My chickens used to enthusiastically run up to the gate and greet us whenever we came into the yard, and spent their days pecking and scratching outside. Around November last year they started molting (I think their first noticeable molt, they are 2,5 years old). At that time they became very shy, staying toward the back of the yard or under their shelter. I'm sure the molting has long since passed but they are still acting very insecure. They spend the day in the coop, under bushes or a shelter. They never run up to us anymore, even when we have food. They used to be obsessed with food, now they are not as in to it.
Does anyone have any ideas as to what could be wrong and how to bring back their outgoing personalities?