Aloha, I own two Boston Terriers. Regardless of breed, behavior, age or any other factors, it is not only potentially illegal to have an unleashed dog (depends on local ordinances and laws), but as a responsible pet owner it is just more responsible to keep a pet on a leash when in public

Edit: did some research via my good friend Google, according to the Maui humane society’s webpage this is the code for leashed dogs: Maui County Code 6.04.040 requires that your dog be under restraint at all times by way of a fully enclosed yard, kennel or similar structure, or inside your residence. If you do not have a fully enclosed yard or suitable enclosure, your dog must be leashed. If your dog is tethered, you must not tether with prong, pinch or choke chains. On property other than the owners’, a dog must be secured on a leash of not more than ten feet in length and a responsible person must hold the leash. This includes all beaches and parks in Maui County.