Lord of the Beasts - Susan Krinard

Inherited from an otherworldly father, enchanted blood flows through Donal Fleming's veins. Yet though his empathic ability for all creatures gives purpose to his calling as a veterinarian, life among his mother's mortal kind has left him wary, and he secretly hungers for the freedom to live unrestrained by civilized society. Until Cordelia...
Cordelia Hardcastle has always played by society's rules, confined in a gilded cage of propriety and convention. Until Donal Fleming introduces her to a passion she's never dreamed of, and a world she's never imagined.
But Donal's attraction to the remarkable Cordelia has unleashed his most primal instincts. The time has come for him to challenge his destiny and face the consequences of his impossible choice—between human love and the powers that, to him, are life itself...