They are both Whippet x Collie (mother was pedigree, father was the cross). I took them out this afternoon and walked along the hedgerows, one big problem is there is a railway line which lines parallel to the field and rabbits tend to run over the tracks. Anyway, I decided to walk along the hedge and train track, one rabbit did bolt - Fin nearly caught it before it got in to a bush so I'll try that tactic going forward. I'm also planning on getting out late/really early over the weekend and see what happens then. Fingers crossed!