The Pterodactyl is still snapping at me after I helped it.

Hint 1 of 5:

You need to heal its wound in addition to taking out the arrow.

Hint 2 of 5:

Unfortunately, the potion of Healing won't help.  You'll have to find a more
natural healing item.

Hint 3 of 5:

Check your Legends and Lore of Quendor for a healing item.

Hint 4 of 5:

Spenseweed, the plant that grows near signs, can cure the Pterodactyl.

Hint 5 of 5:

You can find some spenseweed at the edge of the Fields of Frotzen, one move
NW from where you started the game.