mark i wish you and your dog well, fingers crossed you shut some of these fen runners up....atleast your out and about doing it, where id dare bet alot of the anti mark brigade are to busy on the buttons to put into there dogs what it seams you put in to yours, so my hats off to you.... before i get jumped on , no iv never ran fen hares nor ever seen them run in person, so cant comment on what it takes to catch one,or used to take to catch one but what i can say is i run ground that holds similar numbers of rabbits to marks, and can say that on such ground, you can slip your dog for a rabbit,