I recently had twins, one with numerous problems and was told he had about 80% chance of having CP. We started physical and occupational therapy right away because his legs and feet were pointing outwards.
This has done wonderful things for him.
Maybe your cousin should try something along those lines. You would be amazed at the progress just over a couple weeks. Does your cousin see a Neurologist? They can usually suggest the best kind of therapies for your situation. Hope this helped a little. Good luck to you!