I'm so sorry for what you're going through right now. My Mom had Alzheimer's and it was heartbreaking as she gradually forgot who I was. In the end I was just someone she'd occasionally give a big hug and kiss to, with no recognition but just pure unselfish love. Then there were the times she'd push me away when I tried to feed her...

If our cat Rocky became seriously ill it would just tear me up. I'm so sorry about your dog.

It's essential that even the tough guys share their feelings. You did the right thing coming here.