The best food for the dog is dog food, if you cannot give it dog food and eat home made food, pay attention to the mix to ensure balanced nutrition. Take him for vaccinations and deworming when age appropriate. As a puppy you must pay attention to the gastrointestinal tract and not eat indiscriminately, and it is best not to bathe him too often to avoid colds. As an adult, it may be easier. Regular worming and bathing etc.
