Gizmo was 12 and we had his since we rescued him at 6 month old. He was then diagnosed with a heart condition. He was on pills every day since then. He went to sleep on the couch but never woke up bless him.
Hugs to you and gizmo...my last old girl passed on my bed in my arms.i take a lot of comfort in that and bet your old guy gizmo went to sleep deeply,knowing he was loved.
So sorry to hear about Gizmo. It is not easy to get used to life without a much loved dog, but you can celebrate what a wonderful life he had - loved and wanting for nothing. RIP wee man.