Putting a dog down is one of the hardest things to do. I've been through that, I know exactly how it feels. One of my dogs unexpectedly died right at the top of the stairs in our old apartment. I woke up to my dad crying, which is a rare thing to see, and I asked him what was wrong, and it took him forever to say that Blackey died. Our bedroom doors were right at the top of the stairs. We just looked out our door and there she was, laying on the ground motionless. Later that morning we went out and buried her in our backyard. That was a tough day for everyone, especially my dad. The dog loved my dad more than anyone, and my dad her. Losing your dog is the worst feeling in the world.