The owner of a vicious dog shall not suffer or permit the dog to go beyond the premises of the owner unless the dog is securely muzzled and restrained by a chain or leash and under the physical restraint of a person. The muzzle shall be made in a manner that will not cause injury to the dog or interfere with its vision or respiration, but shall prevent it from biting any human or animal.
(`83 Code, § 3-303)