I remember reading an article a long time ago about someone who had an injured dog that was partially paralyzed that they couldn't keep and their vet took him home with her. She used massage therapy and a whirlpool. Water is a great therapy for handicapped pets as well as massage therapy. Anyway, to make a long story short, the dog recovered and lived happily on the vet's farm and was able to run and enjoy life. Here are some articles that might help in your little one's recovery:
http://www.handicappedpets.com/Articles/index.htm