Why is there no Nutri-Score for animals?

Each animal is different (a snake does not have the same nutritional needs as a cat or a dog)

Even within the same type of animal such as dogs, the nutritional needs vary according to the life of the sedentary lifestyle, a possible castration or diseases.

It is therefore complicated to calculate a score for animal feed without involving dozens of researchers and creating dozens of different algorithms, which has not been done to date.