Nutrición en gatitos y cachorros: la importancia del tracto gastrointestinal: Las evaluaciones nutricionales, incluida la calidad fecal, son de gran utilidad durante el desarrollo de perros y gatos. Diversos factores, como la edad o la raza, pueden influir en la digestibilidad de los nutrientes

The article talks about the nutrition in kittens and puppies. It mentions about the importance of the gastrointestinal tract nutritional evaluations, including fecal quality, that are useful during the development of dogs and cats. It mentions that the best known function of the gastrointestinal tract is the digestion and absorption of nutrients, and also has a function barrier and immune essential for health.