Yes @perchie.girl is right... they are seasonal layers, sorry I didnt think to say that!
And when I got mine from the other people I kept them in their coop for a month(only that long because they were in bad shape they had like no feathers on their backs at all and infected from bug bites on them so I got them better before letting them out) so they knew where home was. And their food and water stayed in the coop. And after awhile these ones I have left they live with the chickens and put themselves up in the chicken coop. They follow me around for food around feeding time.
They are great for tick control and bugs all the way around. As well as good gard "dogs".
So if you get adults I could keep then where they will be living for a week maybe if you are afraid of them leaveing. So you know they know where home is. Just a thought.