I am so sorry for your loss. Coco what a legend and 18 ! He must have been the best looked after pooch!
I have a feeling he was a little ball of white fluff?
What a GRAND age for a pooch. Do you have lots of photos to cherish? Maybe in heaven dogs and cats are separate till they work out who is who. Maybe after a little while you will have a dream of them being all together.
Are you able to go for walks where you used to with Coco?
I'm sure they have enough to eat up there. They are all n Paradise nw. I bet all three of them are keeping an eye on you.
Coco sounds a very much loved furry family and an amazing companion to you.
Take care there Rachael