the german shepard would need a lot more walking than the dachshund and that might become an issue, as in would you take them for seprate walks or together and then have to carry the dachshund?

My dad had a dachshund when he was growing up he said it was a nightmare when they went walking with other dogs as the dachsund would just sit down and wait for my dad to pick him up and carry him! I can just piture it now him back in the 70's with flares and long hair carring his mothers dachsund!!!!