Lucas got rushed to the hospital after his attack and had to be strapped down and sedated when he shifted for the first time, so the first few days in the hospital are really confusing and stressful for the poor kid :(
a side-effect of his infection is that his hair starts to lighten to match his shifted form's fur pattern. by the time he goes back to school after summer vacation his hair's gone fully blonde - but that's the least of his worries, since he's the only were in his year