I keep reading about the Buster cube. 3-month old puppy Linus mostly ignores the much-hailed Kong but loves chewy Nylabones and games of tug (as he can get carried away with this, we play gently!) Older dog Puzzle likes Nylabones, too, but doesn't care for toys at all & mostly ignores them, unless Linus is playing with one -- then he's interested

Linus also loves for me to put treats in a specific old shoe that's his, and then cover them with various toys so he has to dig & pull each one out of the shoe before he gets his treats
What are the favorites for your dog?