Hi @valerie6062, I apologize for repeating myself, here, but I'll leave this post as is.
I think you make a valid point. I can't imagine the heartache of losing a precious pet, then managing a drastic move and relocation on top of that.
There are genetic markers for PMR and GCA, but, there has to be something to cause the immune system to go into overdrive and attack the body. My mother-in-law came down with GCA after returning from a long road trip that involved a family reunion, my maternal aunt got symptoms after injuring her back, and I had an ankle injury first, then pain and stiffness throughout my entire body a few days later.
I've read that injuries and/or stress can aggravate the immune system.
I wonder if everyone with the genetic markers, most common in Northern Europeans, and especially Scandanavians, develops PMR and GCA.