Water & Nutrients. Like humans and animals, plants need both water and nutrients (food) to survive. Most all plants use water to carry moisture and nutrients back and forth between the roots and leaves. Water, as well as nutrients, is normally taken up through the roots from the soil.
Changing from puppy food to adult food depends on the size of your dog as an adult. If he is a small breed and will not exceed 30 pounds, he is mature at 10 to 12 months old. Some small breeds are mature before 10 months of age. Medium breeds are dogs that do not exceed 80 pounds at full growth.
While most pups are considered adults when they reach 1 year old, the fact is, dog breeds mature at slightly different rates, and not all dogs are full-grown on their first birthday.Small breeds reach adult size more quickly; some larger breeds may not be fully grown until around 2 years of age.Until they are fully mature, pups need special nutrition to encourage healthy growth at an appropriate rate.arge and giant breeds, those over 80 pounds, may reach their full size between 18 months and 2 years old. If your puppy is still a youngling but you want to get an idea of what size he'll be as an adult, you can estimate his adult weight by doubling his weight at 4 months old, recommends PetEducation.com.