I feed Wellness small bites so the pieces are plenty small enough for their little mouth
. It comes in a resealable bag

It is also a pretty good grade of kibble! I understand picky (Sugar......why can't you just EAT it?????) But I'm worried about her nutrition so I "sweeten the deal" with some boiled chicken pieces thrown into the bowl

HTH
Not sure of the age to switch from puppy to adult tho.