i had the same problem, i borrowed a Frabo leather harness and it fit much better, as it has a much smaller chest piece. Its about $70. Or you can try the gappay leather agitation harness that has no chest plate for about $40.

The fit of a harness can be influenced by how the straps pull when under pressure and where they are hitting on the dog. If a dog is particularily deep-barrelled and has quite a bit of forechest and the chest piece is too short it is pulling the girth strap part of it forward and when the dog pulls it can ride up into the throat. Also the ring attachment has to be in the right place for the point of pull. A chest piece that is too long on a dog with less "chest" can slide off to the side and the will pull differently on the dog as now the girth is allowed to go too far back. The picture that Ingrid posted the style of harness has no chest piece so it looks like it can self-adjust to get the best line of pull(the ring attachment is fairly high up also), so it might be a better fit on a dog that is a little out of the norm build wise as it is quite a "forgiving" fit. The body shape and build of protection breeds of dogs seems to vary quite a bit so "one-size-fits-all" is really "one-size-fits-most". I don't know if I have explained this very well- it is easier to show than it is to put into words. Can you post a pic of the dog with the harness on?

if you do find a good saddlemaker, take the dog and the harness both, show him/her what the problem is--i'd think they'd be able to figure out what needs to be adjusted/fixed. but definitely take both with you.

let us know the outcome, too!

I will try and get a picture of him in his harness. I managed to get his picture on here once before, lets see if the computer tard can do it again. <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />

i know i've posted this before and i hope its worth reading again. one thing i have noticed about harnesses is that it seems like the dog is more likely to end up with the long line between their legs. a collar will rotate 360* around the dog's neck while he is running with the sleeve, but the harness is stationary so if the handler doesn't keep that line up high, the dog ends up with it around his legs ----other than that, i like the harness. as stated previously, it allows the dog freedom, doesn't inhibit barking or breathing, which may help to build drive. we use both, but i do prefer a collar for a dog that requires more control.