2. "Research on Dog Behavior: From Basic Training to Advanced Skills"

3. "The evolution of dogs and their contribution to human history"

4. "Physiological Structure and Function of Dogs: From Anatomy to Physiology"

5. "Psychological Development of Dogs: Cognitive Process from Puppy to Adult"

6. "Social Behavior of Dogs: A Study of Group Dynamics and Leadership"

7. "The dog's sense of smell: from basic principle to applied research"

8. "Dog's auditory system: sound perception and processing mechanism"

9. "Dog's visual system: color recognition and spatial navigation ability"

10. "dog's athletic ability: a study of muscle strength and endurance"

1 1. "Nutritional requirements of dogs: from basic diet to special needs"

12. "Dog health problems: common diseases and preventive measures"

13. "Dog reproduction and inheritance: the relationship between genes and phenotypes"

14. "Age change of dogs: physiological and psychological changes from infancy to old age"

15. "Environmental adaptability of dogs: the transition from wild environment to family environment"

16. "dog protection and welfare: law, morality and practice"

17. "Humanization of dogs: the role change from pets to therapists"

18. "dog's language understanding: from nonverbal signals to verbal communication"

19. "The moral status of dogs: from animal rights to human companions"

20. "History and Culture of Dogs: Reflection from Ancient Myth to Modern Culture"