In need of some advise please .i have found afew times when slipping the dog on a close range rabbit say within 5/10metres,once the rabbit runs the dog gives chase.however if the rabbit happens to make it to some longer grass and stops the dog no longer seems to see it and shoots past ,even thou the lamp is still on the now squating rabbit. As i said it only seems to be when they are very close. Would it be worth trying a filter? Thanks in advance for any answers. Hope this makes sense, just to add the dog is in his second season, 28months old .thanks