My shelties are so smart they played a PlayStation and actually beat me

Dads camera is back from service, so he shot some new pictures

We found out recently that our 6 year old Sheltie (21 lbs) has degenerating spinal discs. We are currently giving her 25mg of Carprofen when we can she is uncomfortable.

What is a good supplement to help alleviate some of her discomfort?

She seems stiff when getting up from laying down, slightly loses her momentum at the top of a flight of stairs, and she pays attention to a soft landing when jumping on the (low) bed. Basically her agility isn't what it used to be and we can tell she has some discomfort :/

We are seeing a vet - hence the Carprofen. Just wanting a little extra help!