What seems to be paranoia at first -- the consequence of over analysing Harry’s every response to him in hopes of avoiding another, potentially unrecoverable, misstep -- turns into certainty as the first week of Harry’s courses moves into the second and nearly to the third. Aside from an unusual tiredness he’s eating fully, even forcing himself through richer foods or larger portions despite clear discomfort while still faithfully taking the Weight Gain Potion acquired for him. It should be reassuring given that additional stone that he could stand to gain, but... Harry fought this, each meal they took together, insisting his weight is fine and mentally focused on never being fat.