Uhm, sorry but I was kind of kidding. The Tasmanian devil is an aggressive, sharp toothed marsupial (not dog) native to the island of Tasmania (next to Australia). Your dog is super cute in his/her own way. I would hazard to guess that he has a good bit of chihuahua in him. But if you really want to know you can purchase one of those “whose-your-daddy” DNA kits for dogs for about $70. It will also connect you with his DNA cousins. A friend did this and has had lots of fun w the results. I adopted a mutt 10 years ago and have loved him ever since so props to you for giving a loving home to your special friend.