spinal stroke,back left leg still not working after 3 weeks,what can i do

my dog knakita ( alaskan malamute) suffered a spinal stroke 3 weeks ago and initially was paralysed,but due to amazing care and treatment at langdons vetinary hospital bristol,uk,she has regained the use of her right rear leg,im doing physio 5 times a day and driving her to bristol twice  a week to have hydro therapy,but altho she is improving on right rear leg everyday i cant see any improvement on her rear left leg,so upsetting as she drags her left leg when i walk her with a sling,can anyone help me help her,please.

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