I have not played this one in the D.E yet but the respaw thing is not a bug. Besides it's a resurrection spell, not a new chicken each time, which means that if a chicken dies far away from the ohers, they will not resurrect it. The best tactic is still to kill them all at once, though. Anyways, it's not a bug and you should get ready for other surprises like that in the future.
Last edited by GenericNameHere; 14/09/18 07:39 AM.