To use this Oxbow Garden Select food for your young guinea pig, simply place the appropriate amount in your pet's food bowl daily. The recommended amount depends on your guinea pig's age and weight, so you can consult a vet for the best quantity. Always make sure your guinea pig has access to fresh water along with the food. When it comes to storage, keep the food in a cool, dry place. Seal the bag tightly after each use to maintain freshness. If you notice any signs of spoilage, like an off - smell or mold, don't feed it to your pet. Also, while this food provides great nutrition, it's a good idea to give your guinea pig some fresh vegetables occasionally for variety.