Just depends how you are wanting to catch rabbits, if a netting/marking dog most breeds will do the job given chance, i have a young collie now which is coming on great, steady and great marker and still just a baby. Runner types i like a whippet or grew type cross, probably 3/4 runner so 3/4 whippet or grew and 1/4 beddy or same but 1/4 collie, i like the idea of a 1/8 beddy 1/8 collie x as well. I prefer a smaller runner but just a personal opinion.