Lu can be very picky with her food. She stopped eating just dry food ages ago (she went almost 3 days with no food simply because she didn't want it) so now I use a mixture of wet and dry
The dry food I use is Acana (Small Breed) and Natures:Menu wet food. She still has her days of not eating much, but she always eats something now
She cleans the bowl the majority of the time.