Wow Thats sick someone felt the need to murder your dogs.... It could quite likely have been someone who wanted to rob your home later that night.
My friends dad works for the Rcmp and he was telling me about what burglers usually do before they try to rob you usually they find dogs dead in the backyard. Its brutal they cant help you either but its pretty likely they wont be able to find the murder because they have no leads or suspects. they cant do jack the law works against it self in so many ways.
I feel sorry for you and your family I hope Rouge gets better soon Karma with catch up with the murderer if the law doesnt
"Far more crime and child abuse has been committed by zealots in the name of God, Jesus and Mohammed than has ever been committed in the name of Satan. Many people don't like that statement, but few can argue with it."