What Breed is My Dog?

I'm doing a lot of research and finally found that I think she is a Chiweenie (mix of Chihuahua and Dachshund). She's a little old and eats everything if is good food, she's a fat dog, and barely plays, but loves to be inside and lay on the sofa, she is patient and loves to be with her family, she's a smart dog and has a lot of hair.

By confused owner from Tampa, FL