dad and advanced mestasticied prostate cancer

My dad is 74 and this is the order of events. Prostate cancer removal in 2005 radiation there after. cancerfree until 200p found out that ther cancer spread to the bones in two spots. Had readitation in should because cancer had lodged there. That was sucessful.2009 had orchioctomy in Novemember. Dad moved in July of 2010 to live near one of us kids. Had a bone scan when he got moved and they said there were spots all over now and pout himon casodex. 2010 and 2011 had a dull ache in his rib byt they said it was nothing. january 2011 he had problem s with eating adn vomiting etc and had pain in his side. They did a bone scan and organ scan and said he was passing gallstones.march 22 he had a gallbladder removal and after still aches on his side and lost weight and cannot eat too much. He also has swelling on his back from the shoulder blade down that has gotten wider, He sees his oncologist may 3 and is seeing a pain managment person . He is tried too. I think my dad is going thorugh the end stages now. Is he? I am up here indeeinftely .
Anna