Ten in three months is a lot. How did you quarantine them?
They shouldn't be. If they are continuing to have bad sheds then there is a problem with your husbandry. I've also never had a snake with a bad shed due to stress and adjusting.and each snake has a rough shed after transport due to stress and adjusting i am assuming they have a rough time with their shed EVERY time
BTW did you ever get any thermostats?