We've taken to spelling food items in our house because Duke knows just about any food-related word! Seriously--and he can hear that cheese wrapper or peanut jar opening a mile away.
I suppose it's their excellent sense of smell that gets them going--I've often called Duke just a "nose with legs." And they don't make very good digestive decisions, either. That's why we must be super diligent not to leave anything resembling and/or smelling of food where they can get to it--they might choke or get very sick. I've also learned not to put ice cream sandwich wrappers in any trash receptacle in the house except the kitchen one with a lid, too. *sigh*
What are your doxie's favorite foods? Duke loves the aforementioned cheese, peanuts, plain spagetti noodles (cooked, of course), green beans, any kind of meat (but we're careful not to give him anything fatty, like pork), apples, sweet potato. That's just a partial list, of course.
Dachshunds . . . you gotta love 'em: and give 'em a treat now and then!