I hope that you find your pet. It is easier to get your answers from the Humane Society by going there in person. It is kind of hard to contact them by phone but I am sure they can help you.
Go online and check pictures on Hillsborough Pet Resource Center. They have lost and found and a place to Search online. Highly recommend going to shelter and looking. Be sure to take vaccinatuon records when you go.
Post it on Facebook and store's that permit it in the area you lost him.Hes probably trying to find his way home.what kind of dog is it. Big little.my pitt boxer mix got kidnapped.
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