I have a 13 year old German Shepherd who was diagnosed three months ago and has quickly started deteriorating. My heart hurts because I have to put him to sleep and he has guarded and protected me all his life. He can't play or do things that he has always done and so now I have to protect him from sadness and anxiety. I have tried everything I could to help but nothing is helping so tomorrow I will protect him most by letting him go & I am struggling so any words of wisdom would be appreciated from anyone who has experienced what I am going through right now.