[Sundae]

Dylan used to hang around the kitchen while I changed the litter trays just so he could jump in and have a wee in the fresh litter. Even if he could only squeeze out a few drops.

But I never had any problem with them not burying.
They bury to removed traces of cat from the area and therefore protect themselves. You should be flattered your cats feel protected enough not to (I'm trying, I'm trying!)

The only suggestion I can make is perhaps change their food so their poop doesn't smell as bad...? Dyl would do one a week that would dtrip the paint from the walls, but once I switched them onto a fresh meat & bones diet they only seemed to do very hard, dry ones whic didn't smell. Bonus!