Delgado always loved his kong when I stuffed it, maybe your dog just isn't interested in it.
How is his food drive overall? I'm just curious, it might be the kong or maybe the food
Jasmine - Female Miniature Poodle - born Aug 15, 2010
Loker Delgado Von Stalworth - Male GSD - born Jan 26, 2012
Koda & Zazu - 5 year old male cats
Alex - Male Cocker Spaniel (rescue) - RIP Cuddlebug 2007-2010