For sustaining a healthy life and to perform the survival activities properly,your pet needs proper nutrition. Pet food should be a wholesome mixture of all the essential nutrients that an animal needs depending on its age and physical activity. When you buy pet food,look for the following five nutrients and their portion per serving as it would decide how much of what nutrient has your pet eaten. Different animals need a different amount of these biomolecules so it's not one shoe fits all theory. 1. Proteins As the essential building blocks of tissues and bones,healthy proteins must be part of every pet's diet. Amino acid chains make the muscle structure and maintain a healthy physical appearance. So proteins cannot be compromised in your pet's meal. There are two sources of proteins for pet food i. Animal protein This kind of protein is a compulsory part of the diet for carnivorous pets. The animal protein or meat protein is mostly from the skeletal and smooth muscle