Dawn Treader Valley some people think it's a curse

The feathers crunched lightly in his mouth as he turned his head to see disappointment in Citrine's features. She was quick, but perhaps not used to the shifting sands underfoot which might have cost her the hunt. Failure was something Tumbleweed could easily forgive, and he rewarded her efforts with a smile and a wave of his tail. 

A jerk of his chin gestured further into the desert. There, the Oasis remained, and they could share the bird he'd caught and he could make sure she'd been rehydrated before she went on her way-

unless she chose to stay, and become a Sandstrider herself.