Order Only: We've been delayed in the Forbidden Forest

I know, I know, it's dark and the lecture's about to start. But we've found a thestral foal, and it's hurt; it has a torn wing flap and it seems to be in quite a bit of pain.

Sally-Anne or Madam Pomfrey: do you have a suggestion for treating the wing? I don't think we should linger here much longer but aren't quite sure what to do.

I think some Acromantula silk would be useful for a dressing, but Colin and Divyesh are being quite firm that we shouldn't go looking for any now.