I've been giving Jax CBD oil ever since he was diagnosed with IVDD and had his first surgery in 2017. Does it help? Hell if I know. But it doesn't hurt and if there is any possibility of it helping, then I have no problem continuing it. He gets acupuncture about once a month as well as other joint supplements.
I have used a few different CBD brands but have been using this one for awhile which I can get locally but they ship as well - https://www.allthebestpetcare.com/what-hemp-cbd-can-do-for-your-dog-or-cat/
I get the 1800 mg Wisely Extra High Potency Hemp and give 3-4 drops twice a day with his food.
Here is another one you can order online and I know a lot of people that use this one - https://treatibles.com/.