Scared dog at Lleithyr Meadow

Has anyone else experienced problems with their dog at this lovely site? We have just returned from Lleithyr & our dog, who is a robust , confident,idiotic  hound was a shakuing wreck whilst we were there, refusing to walk or play anywhere near the site. No other dogs appeared affected by whatever was worrying him & when we left the site to vist Porthgain, Portclais & Caerfrae he was immediately back to normal. It was'nt the Rook's ,we have them here in our Garden?We would love to go backbut obviously not if he is so distressed.