So sorry for your loss. Whenever one of my pets dies I refer back to this paragraph which is from The Cats of Thistle Hill by Roger Caras.
” But now I realize in a quiet and I guess resigned way, that every pet we ever hold is a tragedy waiting to happen. It is inevitable. From long experience I know that the fact that a pet dies is far less important than it lived. I can look back on some lifetime favorites and I smile inside, not cry. I remember the wonderful things they used to do, not when they stopped doing them. I guess the only question we have to ask is, did we do as well by them as we could have? I hope the answer is yes. I think it is.”