Breachy

(a.) Apt to break fences or to break out of pasture; unruly; as, breachy cattle.

Thesaurus Entries

breachy, contumacious, defiant, fractious, incorrigible, indocile, indomitable, insuppressible, intractable, irrepressible, obstreperous, out of hand, recalcitrant, refractory, resistant, resisting, restive, shrewish, unbiddable, uncontrollable, ungovernable, unmalleable, unmanageable, unmoldable, unruly, unsubmissive, wild