My condolences on your loss. The bond that exists with our animal friends is difficult to explain to those that haven't experienced it. I know I only need project into the future when my 12 year old cat Calliope dies to have a wave of grief pass over me and she's still remarkably healthy and spry.
In the Catholic school of my youth St. Blaize Day was when the priest would place crossed bones at our necks and bless our throats. I didn't know about his Celtic Shaman origins.
Remember every animal treated with love and kindness on this planet helps balance the degree of mistreatment so many are subjected to. Sirius is no doubt even now making her report and you're receiving high marks.