That's what we feed ours with sometimes a bit of James Wellbeloved wet as a topper. He seems to be doing OK with that. No really antisocial habits (except barking when the shower is turned on). But then he is three years old now and we didn't have as a puppy.

From experience as a trainer/behaviourist I would still change the food.

Good point.
We have changed ours a few times. Sometimes based on the quality of the poo.