[Neil]

Some dog owners are just ignorant and stupid.

I hope you reminded him that you are well within your right to shoot his dog if it is bothering your horses.

My dog is always on her lead when on footpaths in fields.

You could ask your contact at LCC to put up these signs at either side of your property on the path. They may even send you the signs if you offer to put a couple of posts up and attach them for them.