Thank you very much to everyone for your input! I've tried being more strict with the feeding times and taking it away if he's picking. I think I'm going to consider the switch to wet food and actual meat products because any time I add in some "bonus" meat to his kibble, he goes nuts.
Teething certainly doesn't help, but variety is definitely key as well it seems. Also feed him out of the big Kong rolly thing sometimes where he has to tap it the right way to get food out. Seems to engage the hunter in him.
Anyway, on with the battle! This little guy is growing into quite the little gentleman 🙂