I have been reading called George, Nicholas, and Wilhelm by Miranda Carter. It is about these three first cousins that were the rulers of England, Russia, and Germany leading up to the first world war. Reading about the tragic circumstances of Wilhelms birth and upbringing make one cringe with a mixture of disgust and empathy. His left arm was injured during the extensive labor which almost killed his mother. Up until the age of 10 he underwent medieval forms of therapy, from stretching on a rack, electrical shocks and "animal bath's" in which his arm was plunged into a freshly killed hare.
I took some liberties as the animal baths ended by age 2 and I doubt they were all conducted at once, but these truth's are stranger than fiction anyways.