That's not bad per se, but white potatoes tend to burn more
quickly than sweet potatoes, so if your dachshund has weight problems, she may need something with a few more complex carbs.
The great thing about
sweet potatoes is that they satisfy your
sweet tooth, but the natural sugars they contain are wrapped up in a nice fibrous package, so the sugars are slowly released into your blood stream rather
than quickly spiking your blood sugar like sweeteners and grains do.