My dad had his knees replaced with plastic knees and is now in a wheelchair,
the muscles tightened up so he has never walked.

He went into the hospital walking fine for short distances and now can't
stand up as the muscles tightened in his legs.

Anyway, now he is trying a new treatment where they inject botulism toxin
into the body which makes the muscles relax.

Does anyone know anything about this?

He said it  is a new, experimental treatment.

does it sound risky to anyone else besides me???

Would a paleo diet have helped the muscles to relax?