Ela, my three year old had her first severe SCLS attack in September 2010. She was not diagnosed at this stage and they gave her a lot of fluid. She had a lot of muscle wastage and could not walk for about 2 weeks. When she started walking again, she had what they call "foot drop", which I believe is the "stepping" way. I was thinking about PT but the foot drop went away by itself after about another month.
Ela's due for her third IVIG dose just before Christmas. I hope Connor's PT works for him and that all you brave, brave parents and kids have a great Christmas!