That species growth did not happen in the wild, however. Dogs did not become so common until after they attached themselves to humans. Without the easy food and protection offered by humans, dogs may not have been able to grow in population so much. However, even 50 years ago, we did not have all these pelleted commercial feeds for our dogs and they still managed to survive.
When I was a teenager, I lived with my grandparents on their exotic animal farm. Though they had nothing the size of a tiger, there were many animals there who were capable of causing severe damage and even death to people should they get the opportunity. While the potential for harm was always there, the learning experiences for us and for the public were tremendous. The animals on this farm were used to teach others about the different animals in our world, expanding the minds of children and adults alike.