To use these Hill's Natural Flexi - Stix Dog Treats, you can give them to your dog as a whole stick for a longer chewing experience, or break them into smaller pieces for a quick snack. As for the frequency, it can be given daily as part of your dog's diet to support joint health. When storing, keep them in a cool, dry place. Make sure to close the package tightly after each use to maintain freshness. Always provide fresh water for your dog when giving these treats. Also, keep in mind your dog's overall calorie intake as treats should be part of a balanced diet.