While I am totally
at the whole thing, and am not condoning it it does say that the act was consensual (on the part of the man and women at least)
And he was not to know that she would die. He faces life in prison!! 
It seems a strange charge to bring. Animal cruelty yes. But this just seems odd. Or is that just me? He didn't actually perform an act with the dog, she did. I can't get my head round this at all
It reminds me of the case in the 90s when a group of men who were consensually taking part in some pretty violent sexual acts together were charged with assault on each other...