I’ve owned two Dachshunds. Fearless, they think they are big dogs. Extremely loyal and loving, but not that intelligent. Our last one we took to obedience school. It was embarrassing seeing him unable to keep up with the other dogs. If they had dunce caps, he would have earned one. Finally, the instructor said he could get his “diploma” if he came to us when called. At least, he managed that.
Neighbors had a longhair Dachsund. It knew how to ask for a belly rub. Always looked like a happy dog.