Wiiiiiii
Can't admit to having known the answer, though reasoned it was likely something to do with a form of obstacle 'avoidance' from the bunny. How little they know....
Seems an opportune moment and audience to ask....If we have what we believe to be foxes urinating in the garden, how do we best discourage them, save calling in the local hunt?
If it is foxes, you have to try to work out why they're coming into the garden in the first place.
The number one reason is food. Are there dustbins that they can get into, or bowls of half eaten dog / cat food etc?
Next is shelter. Are there loads of big private shrubs or perhaps an old shed that they could dig a nice den beneath?
Then there's plain old territory marking. If there are a lot of foxes in your area, they will be keen to mark their territory, and having done so, will visit on a regular basis to renew the scent.
The best deterrent is a dog that doesn't like foxes. Failing that, a good fence that extends at least a couple of feet below ground is a great help.
Remove all traces of food, and pour soapy / disinfectanty water over the scent marked patches.
You can but deterrent chemicals from pest control people or at some garden centres, but be aware, they will deter other wildlife too.