He may need a buddy (A hunting dog) soon. He He! 
We rescued a Golden Retriever and German Shepherd mix. He must have been the rut. Face coloring and back markings like a GSD, but ears, tail, fringe on legs and butt pantaloons like a retriever. Only 45 lbs. A real lover, must be with you....but sometimes doesn’t know if he should lick or bite. Just joking about a split personality given his breeding.
He is darling, people are puzzled when I ask what they think he is. So, you never no. His breeding would suggest a weight around 80lbs.
Good luck.
We have a 10 lb mix 3/4 maltese and 1/4 yorkie. Best dog ever. Smart as the dickens and a loving lap dog. We actually have to spell words around him for certain things. He will be 11 in April.
bfl
He may need a buddy (A hunting dog) soon. He He!
Best advice: go on-line to the web-sites for your local animal shelters/rescue organizations. Check the credentials of the organizations too; there are many well-meaning rescue groups that don't really understand "matching" dogs to families!
Consider adopting an older, or even an elder dog. Puppies are great, but a lot of work!
Another female would probably be best; sometimes two males (in my experience) are too competitive, especially in "marking" territory.
You can not go wrong with the rescue dogs and mixed breeds (in my experience)...check the on-line information, especially for the older dogs (my two now are 9 and 13 - one was 2, the other 1 when we adopted them - and we were able to get "background" info. for them, like whether they get along with cats, kids, etc.)...THEN, after you find a possibly suitable new family member, go visit her/him.
Be prepared for surprises! We went to see one dog, and ended up falling totally in love with a different one! Back in those old days, we were not allowed to adopt her until she met our other dog, and came for a "home visit"...that's ideal, of course, to make sure it's a good "fit" for the family, but you can also arrange that yourself at a reliable shelter (having your dogs meet, etc.)...
LAST thing...I've always had a soft spot for dachshunds (sic) because they were our family pet growing up. Great with kids, don't know about with other dogs/cats? You might also consider a more mature (if there is such a thing) rescue Golden...not that your girl is replaceable, but they are such sweet happy dogs by nature.
REALLY the last thing: you will know the "pup" (whatever age/breed) for your family when you see her/him! Good luck! It will be a happy project, and be sure to let us know what transpires!
My wife and I visited our local City Animal Mangement Center this morning. We now have a 15 lb Scotty/Terrier mix 1 yo young dog on trial for 3 days.
3 hours and it looks like a perfect match.
More updates later. Thanks FReeper friends for the advise.
Hi there....sorry about your dog :-(. We are in the process of doing the same thing. We have a Labrador who is 10 and going deaf. We knew we wanted to downsize so we bought a little Yorkie. Our Labrador raised him so he believes he’s a small Lab. It worked out so well and we adored the Yorkie so much we got another. We travel in our RV with both Yorkies and the Lab. I highly recommend Yorkies. Very affectionate and very smart!
Our Starr now has a “forever” home with us. She is a mix of Dachshund/wirehaired/Terrier and about 1 year old. Adapting well to our other pets(Golden and 2 cats) and our home and yard.
Thank you FReeper friends.