With this

Gift, the Garou can swell his musk glands, allowing him to spray musk like a skunk. It is, of course, taught by a skunk-spirit.

System: The spray is directed with a Dexterity + Primal-Urge roll (difficulty 7, maximum range of 10 feet). A target struck by this attack must spend a Willpower point to do anything but spend the first turn retching. Afterwards, he subtracts one from his dice pools for the rest of the scene for every two successes rolled. Immersion in water negates this Gift, and it is ineffective against targets with no sense of smell.