Hi Maria....
Wow girl, you are feeding really different foods out there. Orijen is one of the best! Ceaser is one of the worst! Ceaser is to dogs what McDonalds everyday is to humans. JUNKFOOD
Snickers would eat about 1/4 cup of kibble when he was eating just kibble, so I think you're pup is fine. The recommended amount is for an average puppy which would be much bigger than a Yorkie.
Good Luck
Chances are if you've been mixing the Ceaser with Orijen, your pup might not eat it dry now.
Smiles-
Snick & Viv