Animal Crossing Requests

how do you get a dog because i have gone on loads of websites which all say different ways of how to get a dog!It's really confusing!!!Please can someone tell me how to get a dog the real way please!!!

If you have to do a favour for a friend and you cant find the person open your gate (even though a friend might not visit your town)all the people from your town stay in the house!!!!then you will be able to find them!!!!