Age is an important factor affecting the nutrient requirements of the dog. The growth of the puppy will vary according to the size, species, but can be divided into 2 stage, growth stage1) phase 5-6 first month changes from day to day. The bone structure is gradually stronger and body weight increased rapidly. A period of high growth rates, and the digestive tract is sensitive to change. The period of changing the food as food pellets. The digestive system is gradually increased efficiency, like a dog fully grown.2) phase 6 to 10-15 month depends on the species. The growth rate slows down. The structure and the development of strong bones and muscles.The
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