The most important thing to consider is the child’s age; as well as the dog’s temperament, and energy level. As they don’t know their own strength, large dogs viz. Great Dane or a Mastiff can knock children down while playing. Similarly, small breeds viz. Chihuahuas, Pekingese, or Shih Tzu, are delicate and will not be able cope with rigorous play of children. Which means, children can easily hurt the dog.