This handsome gentleman is Hagrid. He shared his home with one of Chris H's blogging friends, Jeremy. Sadly, Hagrid passed away recently, but Jeremy has posted the most beautiful obituary for his companion on his CORN, WINE AND OIL blog which I strongly recommend that you go read. This is the final paragraph:
Rest in peace, Hagrid. You were as good a dog as you could possibly be, and I am awed by your life of service and generosity. I never really deserved a dog as magnificent as you, and I did everything I could to make myself worthy of you, until your last breath.