Ocean's Breath Plateau Why can't I cross this river?

Ash Paw studied him with calm facade. The wound to his hip and rear leg were deep, and she could smell the infection even see the puss. She would need to scrape it and clean it. She wondered briefly if there was any fresh water about. She would need both sea and fresh. She could lick the infection, but she would need to then purge her mouth. She would see what she could do after she rebroke the skin. 

I can heal you, but it's gonna hurt. She spoke softly and then she met his gaze. I don't ask for price. All I ask is you pass the kindness on, someday.

She would not ask for price for this. She didn't even know what she could ask for. Were it something no so terrible, she could have asked for meat or herbs in exchange, but that it had infection worried her. Because even if she did her very best, it could still turn on a dime, and kill him, quick as you please. For that reason it wasn't a perfect healing.