the Jr cow horse is a good bit to introduce your horse to gag bits. its not to aggressive but still has some slide. it also works pretty well when teaching your horse about side pull vs back pull. Like I said earlier in the thread, I teach my horses to one rein stop, so thats important to me. the only thing about it that I dont like (and why I would only use it as a training bit) is that you dont have as much independance side to side. because it has such a short slide it will engage the whole bit with moderate pressure. All in all, not a bad training bit though, but not something I would run in.
Full time trainer of 1D barrel horses.