Caring for a Three Legged Dog or Cat

So I posted before how my girl had started to suddenly stop walking.  Well a few months later after trying rimadyl, gabapentin, adding glucosomine and hydraflex (to her other supplements), massages, physical therapy, xrays, swimming now, acupuncture and LOTS of rest from walks, it has been determined by her vet and physical therapist that she has soft tissue tears in her front wrists.    She has arthritis, but with she is acting now and holding herself  up, we are certain it is her wrists thag are the issue.  Xrays didn't show arthritis in wrists, only normal spots of other parts of body.

I haven't seen any difference with the Rimadyl.  We have stopped that.  Gabapentin has her moving more comfortably in the house.  She is back to tolerating the massages.  She isn't a fan of the water, but the massuve panicking is gone anyway.

Her wrists still go forward more than is normal.  She wanted to walk the other day.  I attempted, only to wind up carrying her back (didn't make it down the street).

I love walking my dogs and feel bad when she wants to walk, but just cannot.  I have a cart for her for when I walk my male.  Walking him and pushing the cart and walking her as far as she tolerates is a bit much for just me.  So I just don't walk her.

We see the physical therapist again early this next  week.  I plan on talking wrist splints.  

The physical therapist says its hard to tell what has caused her wrist issues (arthritis from other parts of body, being a tripawd and how she holds herself, or age as she is 9).  More than likely it is everything.

Considering her age, should I just keep her comfy (no walks, occasional play dates, swims, meds, supplements, massage, acupuncture, etc.)?  Should I be worried of her forward wrists?  Will the soft tissue ever truly heal?  What are thoughts for splints?

Thanks!