Is the Dachsie good with other dogs?
Lab pups can be awfully full on and clumsy, I would be careful the pup doesn't hurt the Dachsie or the Dachsie doesn't feel the need to defend itself. Just be ready to step in as soon as you see the Dachsie has had enough.
There is no reason why Big's and Little's can't mix, as long as you are sensible. Becs here has a Min Dachs, as well as two Labs, a Golden and a little JRT and they all get on fine together. And I had a tiny toy poodle (much smaller than my present Pood), along with my big ol' Lurcher and Collie x and they were fine too.
As long as the Dachsie is healthy, then I wouldn't be worried about them meeting before your pup has had it's jabs. If the Dachsie is known to be anti social though, I wouldn't be in a rush to let them meet up :wink: .