I think you'll find it isn't a one off with the rabbit... I may be wrong but I THINK from what you have said in previous posts about Buddy getting calmer he is probably starting to understand that rabbits can be furniture. But a running rabbit is DIFFERENT to a sitting rabbit! Out walking with another family member later on today Zac saw another/same deer standing with a young one, again he was on leash, saw the deer but remained calm and ate a treat. But it is a MOVING deer that Zac finds most tempting so I know that on another day Zac will lose his head totally over a deer and definately if this one had run he'd have been out of his mind. Off leash is something else again - Zac would certainly not have stood around with me if he'd been off leash! If Zac HAD been off leash I felt I MIGHT have been able to leash him while the deer was standing still but that is something I really don't want to have to put to the test ! I do have an advantage with living in fairly open country so Zac has been able to see quite a few deer at a distance while we work on de-sensitisation. If he only ever saw deer for a few moments crashing by it would be A LOT harder. I saw a deer in a wood earlier in the week, this one must have been sure I hadn't seen it because instead of crashing away through the bushes it sneaked away more or less on tip toe very very quietly , Zac never saw it at all.