At Tom&Sawyer our chefs bake fresh treats for dogs and cats in a variety of flavours. Our research shows how terrible preservatives are for our dog and cat members of the family, so our treats are made without any preservatives. Just like going to a farmer's market for fresh bread, these treats don't last long as they are all natural. We put an estimated "use before" date on each package, but the time depends on storage conditions and is outside of our control. If you keep them in the fridge they will last longer. If you see mold on them, do not use them. Our fresh treats sometimes have a light dusting of oat flour on them (white), so don't mistake that for mold by accident! Your pet will LOVE them! Best treats ever!!