Blood Born by Catherine Wolffe

Dorran O’Hare, a hybrid werewolf seeks the Chosen One. According to the Elders, a woman can rid the world of the Sultan, once and for all. While searching for the Chosen One, he discovers Meagan, a mortal among supernaturals and finds his mission compromised by the woman in his arms.
Meagan Christina is a youthful adult with an old soul. Devoting her time and energy to an animal shelter gives her life meaning and purpose. But when she learns something seems wrong with the animals taken into their care, she knows she must act to save them.