Snake A Way is a product specifically labeled to be used outdoors and the only way to get rid of the odor would be to physically remove it from the area where it was applied. Although the odor is strong it will dissipate over time and lose efficacy. For more information, you can contact the manufacturer, Dr. T at 229-294-9742.
Snake A Way is not harmful to pets, although, some may dislike the odor. Pets should be out of the area during application and for a few hours after. If you have outdoor pets, then you may consider using a natural snake repellent instead, such as Snake Out Snake Repellent.