Your veterinarian may also recommend a transitional adolescent diet for your pet’s ‘teenage’ years. They need relatively larger quantities of food because they are growing rapidly and have limited space in their tiny stomachs. At 6 to 8 weeks of age, they need to be fed about four to six meals a day. By 6 months, the need for food is decreased because puppies are about 75% of their adult size and can be fed two to three meals a …