The Ohio Revised Code Section 955.22 specifies that all dogs must be either confined to your property or be under reasonable control at all times. Letting your dog out the door, for instance, is not normally considered reasonable control. However, walking outside with your dog is. Members of the Dog Warden's office will be enforcing the law and ticketing offenders who do no properly confine matter of civil practice. Special precaution should be taken and newspaper carriers and meter readers.
You can be held responsible for damages which your dog causes to another's property or person. Imagine how your neighbor must feel when your dog runs through his garden, messes his yard, knocks over his trash can, or bites his child. Be sure to curb your dog when taking it for a walk.
It is dangerous for your dog to run at large. Dogs are no match for cars. Your dog may have fun digging in trash and garbage, but it can kill him. They could accidentally eat a sharp object or purposely eat sharp bones, both of which can puncture intestines. That irate neighbor could also kill or injure your pet.
It is against the law (ORC Sec. 959.01) to abandon your dog. Make sure that you keep him safe and you will both be happy.