We had a Greater Swiss Mountain dog we had to put down about a yr ago. It was tuff! It was sudden for us, within 12 hrs when we noticed something was wrong till we made the decision. He was 7 yrs old. Hard to do cause he was family. But in the end it was surgery we really couldn't afford with no real assurance on out come, or letting him go! He was a great pup and will always be with us! Sending my best to you!!!