It is very important to report all found pets to your local city/county shelters since owners may search there as well. The best thing for the pet may be to turn the animal into your local shelter so that pet owners have a better chance of finding their pet. Most shelters will alert you when the pet has surpassed the "holding" period and will allow you to then reclaim the pet or adopt the pet. If you want to keep tabs on the pet, ask for the pet's kennel number.