The authors say more work needs to be done on establishing exactly what foods are best for promoting
ideal gut conditions, however they conclude: «We think a diet high in fruits and vegetables is best as these are rich in fibre / complex carbohydrates, which are important because butyrate - producing species are dependent upon them indirectly via cross-feeding relations with fibre degraders.
It's not the fault of the different food — it's because your pet's
gut has been
conditioned to process only one type of food, which is not
ideal, nutritionally or physiologically.