Q. Our Dachshund is shakey and breathing shallow. It started this morn after he went out with our big dogs. He's not walking on his right rear leg.
A. Dachshunds are really fragile especially with their back bones/disks, if that happened this morning after playing with other dogs I will suspect that is in pain for some orthopedic problem. Go to your vet to check the extension of the damage, could be just a sprain to a disk prolapse. If is something mild with some pain relief/antinflamatories and some rest should be better. But you need to bring him to the vets.