Well, I'm sorry that the halter didn't work for Benji.
Hmmm, lets see....have you tried (to prevent him from pulling), when
you 2 are walking, if he begins to pull on the leash, turning and doing
an about face and walking the other way each and every time he pulls the
leash? This exercise will take a while to work usually but try to keep his
attention on you instead of his surroundings. Take treats, his favorite
anything he likes a LOT or each time he pulls on the leash just stand still
until there is slack then proceed and do this each time he pulls.

I don't like th HALTI the one that Premier makes is better and I know what
you mean about the harness rubbing under the front legs which is the reason
I don't tighten it as tight as they say to. Every now and then I use the
halter on Bailey just to keep him humble......LOLOLOL...and to let him know
it's still in my bag of "tricks"....LOL. Bailey, as a small pup was on the
alpha side and Collies CAN have a small but mild streak of stubborness at time
so as with any dog let them know who is their pack leader! You! I had to train
Bailey NOT to go out of the door ahead of me and he had and has to work
for his treats like sit; down; shake etc....Now he doesn't even go out of the
doors on the inside of the house before I do, like bedroom doors and going
down the hallway, he always waits till I go first....LOL....is Benji stubborn or
alpha type?
Jana