we also had a family dog called roxy
I remember when she died, it was absolutely heartbreaking
the vet called my mother and told her basically that the dog wasn't responding and probably wouldn't come home
later she called back and said the dog had passed away.
I remember for days after, I actually carried the gate with me (we had a gate we put up so she couldn't leave the kitchen on her own and cause chaos)
I'd also ask at random moments how's roxy?
though I knew full well roxy wasn't with us. it was just a comfort to ask that
I believe where ever she is now, she is playing happily with other dogs in doggy heaven and smiling down on me as if to say, I'm happy, please don't cry
and I'm sure your dog knows too. I am sure your dog is up their having fun, and free from pain
I am so sorry for your loss