Follow Natural Resources Wales (NRW) Dog Walking Code 2015 (http://naturalresources.wales/about-us/news-and-events/news-releases/owners-urged-to-follow-new-dog-walking-code/?lang=en).
Ensure dog under effective control (use short lead as required, off lead keep in sight, prevent approaching other users including horse riders, cyclists, and other people and their dogs uninvited)
Follow local signs about access to sensitive areas.
Always bag and bin your dog’s poo.