Abstract: A platform assembly which inserts into the receiver hitch of a vehicle to allow dogs to have easier entry into or exit from a pickup or a sport utility vehicle, and which can easily be removed, folded to a compact size, and stored when not in use. The dog step is formed by a main support bar and a multiple piece platform, hinged together and secured with support braces. The platform will fold, allowing for easy storage. Another embodiment of the device allows for use with sport utility vehicles or trucks with fold down tailgates.