The documentary ‘Science of Dogs’ was so interesting to me but there were some points that I do not like. I think breeding two different species for making a better one is immoral. Human does not have right to do that. Sometimes, animals can get obstacle and disease by hybridization. If disabled dogs born, some people throw their dogs away. Nowadays, there are so many abandoned dogs and the rate is still increasing. They are sent to the abandoned dogs or animal hospital. Then, if they do not parceled out, people administer euthanasia the dogs after few days that appointed. Of course, mixed-breed dogs can looks better but I think mixing for only pleasure of people is animal abuse.