Species, age, activity level, environment and physiological conditions such as growth, pregnancy or nursing affect the nutritional needs of animals.
 
1.   Choose food that mentions both the AAFCO (Association of American Feeding Control Officials) and Animal Feeding Trials on its label. 
 
2.   Pick food that provides all nutrients for your pet, including water, energy, protein (essential amino acids and nitrogen), essential fatty acids, minerals and vitamins. 
 
3.   Select pet food that's balanced. Nutrients must be present in the proper proportions. 
 
4.   Choose food that's digestible. Nutrients must be easily broken down and made available to the animal. 
 
5.   Recognize that feeding directions on labels can only be estimated and must be modified to fit individual pet needs. Check with your veterinarian. 
 
6.   Consider the manufacturer's reputation when selecting brands. Generally, you should purchase brands that are priced higher.  
  

 Preserving food makes water unavailable for bacterial growth. Methods of preserving dog food include drying, salting and canning.  
  
 Because of specific differences between dogs and cats, dog food (particularly vegetable-based) should not be fed to cats because of nutritional deficiencies. 
 
 Your pet may not be receiving a balanced diet if more than 50 percent of it is made up of treats or human food. 
 
 "Palatable" means food is appealing to eat but does not mean food is healthful.