Poderia ser " The Gathering " de Kelley Armstrong?
A year later, Maya is getting ready to celebrate her sweet 16. She wants to tattoo her birthmark—a paw-print shape on her hip. She doesn't want it altered in any way, though; she just wants to make it more noticeable. However, she doesn't get it because the tattoo artist's aunt insults her by calling her a witch in Navajo. Later, she invites Rafe, a new bad-boy at school, to her birthday party at Daniel's house. At the party, the teens have a competition on Maya's new rock wall: if she can beat all the guys, they have to add more footholds, but if she loses to even one guy, she has to kiss him.
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Rafe tells that skinwalkers are people with special abilities including being able to shift into mountain lions or bears, and the ability to heal and communicate with other animals. He says that Rafe, Maya, and Annie are skinwalkers and that they carry their animal traits with them even in human form. This explains Maya's enhanced hearing and night vision as well as her amazing skill of rehabilitating injured and sick animals. Maya makes the connection between her paw-shaped birthmark and the fact that she is skinwalker. Rafe confirms this idea, saying that paw-print birthmarks indicate skinwalkers and that her and Annie both have them.