[sugarmamma]

I have never transitioned Sugar into new foods either.
Even now, with home cooked, her proteins and veggies and grains are switched up within the recipe guidelines routinely with no problems.
Of course, if you have a dog who is prone to GI upsets, you may have to be more cautious.
The breeder should send you home with some of the kibble she is currently eating. Mix a few pieces into the new, better quality, kibble to accustom her to the flavor of the new food maybe.