My dachshund is NOT a typical "dachshund"...she's too small, has no chest, you can see her ribs, etc. I am CONSTANTLY asked what she is, what's wrong with her, etc etc. The vet has confirmed that she is HEALTHY and that her size/shape is not unique, he's seen it before. She is a dog from a BYB, but there isn't anything WRONG with her. It's a constant pain, to the point where she has to always wear a Tshirt just so I don't have to field questions from ignorant people.
I understand your pain!!