Now that you’ve provided a bit more info…
Take your pet to a specialist to ensure he doesn’t have masticatory myositis. In the meantime, many dogs like to place their food elsewhere before eating. If he likes the floor, mimic it by raising a large tray so his neck isn’t straining downward (prevent choking), and spread out the kibble on the tray. Make it fun. Also hand feed & keep some in a raised bowl as well. It could be he may not like the food, so he just plays with it. With patience, you’ll figure it out.
