My Dog Got Up On Sunday And Poop In The

My dog got up on Sunday and poop in the bed first time in his life we got him when he's was two the man that own him wanted do away whit him he was a winner dog his reason was poop in house but in ten years he lived whit me he never did he was going to put him to sleep when he was two he lived 12 years whin I took him out he pee thin he start to breath heven thin I took him out side to get fresh went fell on his side so I pick him in my arms came in to much house then he started to breaded have he lay down then some blood came out off his nose and mouth then he oass away but I don't under stand please help