Oh okay. I asked bc I had a Newfie in one of my classes kind of like that but much younger. I noticed as I watched him that sometimes his head would drop as he stepped on one front leg and I thought maybe he had a thorn in his paw. On examination I couldn't find anything, but he kept doing it so I pulled him and just had his owner watch. The following week, same thing. I flexed all his joints and felt for swelling and heat all the way up, but found nothing. The third week I advised a visit to the vet. Turned out he had dysplasia in both shoulders and needed surgery. Fortunately the owner's husband was a local surgeon and could afford it! But since your Pyr is adult, not likely this is the case. Just brought back a memory. His name was Mac the Newf, lol.