In Northern Climates we like to start as soon as the snow has left the ground. This will allow your herd to replenish their bodies with the needed vitamins that will help them increase digestion and get them back on their feet. In the Central / Southern areas, we recommend keeping a supply of mineral available throughout the year and monitor it by using a game camera to follow the results as the game grows. Please be sure to follow all game laws while using our product.