Animal Frenzy
Washing the bird with holy water doesn't seem to have an effect, thought it's hard to tell with something so small, and with an aura so faint.
The chapel is dedicated to the Ghostwalk, and obviously the acolyte has the offerings you need! (And the motivation to help you, considering he just got attacked!) You go through the rituals, calling on Thovis for aid...
An image comes to you, of the raven flying over a black-and-white forest. It lands near a red pond, drinking it's water. As it drinks, it turns more and more red. Then, it flies out, until it charges into the chapel. You see Buckthorn catch the bird, and Gorrid tend to it. As Gorrid pours blue water over the bird, some of it gets into it's beak, causing the red to fade slightly.