If the Halti is on properly & fits right, it will NOT come off. I trained a Walker Hound who pulled like a mad man from hell. I put the Halti on & he fliped out & I mean "fliped" he pulled backwards for his life, rolled around, he would run so hard that his body went flipping over his head. I thought he was gonna break his back, so I made sure we walked in the grassy ditch & not on the road... it took 2 full day to train him really well on it. & if u have a real Halti the muzzle part tightens & also helps prevent it from comming off.

& for Binx, if he can't have it tighten on his muzzle yet, put it on the side ring (along with the muzzle ring) cause it'll prevent it from tighting but still keep the dog in line. Thats how I use it on Max so it wont tighten on his old face too hard.. But I hardly ever walk him on a leash so it doesn't bother him any longer (Max wont chase or leave my side with permission.. hes trained very well, & his age helps too.