Visited on a Northern Earth Mysteries day out. Our guide warned us that there have been problems with Rottweilers from the adjacent property menacing visitors – physical contact though not bites. On this visit there was barking from a sheepdog on the other side of the fence, but nothing worse. Apparently the structure was originally some 300 ft long (!), but much of the stone has been robbed over the years. The site is somewhat encroached by vegetation, but attempts have been made to cut it back, and apparently the situation is now better than it has been in the past.
It is strongly recommended that you report any issues with dogs and/or vegetation to the local authority if you encounter them here.