My first Basenji, Channayn, would bury things. Once she started digging, she found underground tunnels. I gues this was more interesting. She stopped buring things and just started digging. Everywhere she dug there would be a tunnel.
My youngest male, Mahendra, doesn't bury things, but he hides them. I got some rawhide bones. Not the solid rawhide but the kind that are thin and built up like plywood. All 3 of my Basenjis love this type. To the extent that Mahendra has hidden them so the other 2 cannot find them. I don't know where he hides them, but I should find out and show the other 2. Then see if Mahendra finds another hiding spot.