It happend again,you mixed his potions/spells and Howl got red-haired,he throwed a tantrum about how you are always cleaning and mixing his things,he got into his room after you scold him by how he was acting like a child,and he locked himself into it.

After some hours,you got into his room,holding a glass of water,he was looking away from you,his expression sad and mad at the same time,his hair now is black,you tried to talk to him,but he only nods or ignores you.