I think that would be fine. I love the raw diet and would like to feed raw in the morning and kibble otherwise, but I mine didn't like the raw. She wouldn't touch the NV and when I tried Primal she ate it but with no enthusiasm whatsoever...so I went back to all kibble.
My baby is 5.5# and I fed her one (primal) nugget AM and left kibble available for PM. I probably would've given her 2 nuggets each AM if she liked it. I hope it works out great for you!