Ours were rescue hens (ex battery hens destined for slaughter at about 18 months) and Warrens I think, they cost 50p per hen as a donation towards the cause.
I used to clip the wings of mine else they would fly over the fence and ruin the neighbours gardens

They were also master escape artists so make sure you can keep them well contained! Oh and don't let them have access to any plants/flowers/lawns etc that you don't want ruined, they will eat anything and love nothing more than to scratch all the grass up!
They were so comical though, very time I went into the garden to peg the washing out, play etc they would followme round in a line!
Good luck!