Always attach the leash to a harness. Protect the soft neck area and the force on the spine for all IVDD dogs. Learn how to sort through the many products on the market to find the features your dog should have.
There are many good harnesses in the market. IVDD dog owners should seek a harness that does not wrap around the neck nor sit on the soft tissue of the neck. A leash should always be attached to a harness, not the collar.
Collars for IVDD dogs are only used as a necklace to hold tags.
Avoid harnesses where the pulling stress is on the soft area of the neck.
The problem in getting a good harness fit can be similar to us having to try on several brands of jeans til we find what fits our bodies.
You might see if one of these manufacturers has the right fit for your dog.
• Noodle and Friends never choke Dachshund harness: https://www.noodleandfriends.com/Dachshund-Harnesses-s/1814.htm
• PetSafe Surfit Surfit https://www.pawmark.com/proddetail.php?prod=SFH