Vets usually have information about cremation services. Some vets offer them on site, but some don't - check with your vet. There are also memorial options (urns, paw prints, etc.) that you might want to look through now as kitty is alive, because trying to decide how you want to remember them right after they go is just asking for ugly sobbing. Also figure out your budget because the last thing you want to do is pick something in the throes of grief and be unable to afford it. "I can't even afford to remember them properly" - > More crying.