Popped on here over a year ago for advice about getting my second dog, took it and got a lovely Jack Russell boy who gets on very well with my little girl Pom/Bichon 
Hoping for some advice for his harness. He was fine with a regular harness at first but it seems to be since his 'big boy op' he pulls back on his harness on his walks.
I can find lots of suitable harnesses for dogs that pull forward on the lead but I need one to stop the Houdini Act of pulling back and pulling it all off.
I have most recently tried a non-pull harness but he can pull this back off.
I have also tried a Collar & Harness with a carabiner connecting the two, nope he pulled the harness off and even pulled out of the collar as well, the collar just having the 'two finger' space when tightening.
I have found what looks ideal 'Ruffwear - Webmaster Harness' and this looks absolutely perfect and has many reviews referring to 'Houdini Dogs' saying they can't escape.
This for me would be the last resort for one reason only.....the cost !! £64.95 !!
He is only just over 18 months and not sure if there may be a bit of growing to do, he is a long-legged JR, not the little JR, very stream-limed (I think there may be a bit of whippet somewhere down his family line).
If anyone has had experience of a dog similar to this and found a perfect harness at maybe half the price of the one above (or less) I would really appreciate a recommendation.
Thanks, apologies for long post !

Hoping for some advice for his harness. He was fine with a regular harness at first but it seems to be since his 'big boy op' he pulls back on his harness on his walks.
I can find lots of suitable harnesses for dogs that pull forward on the lead but I need one to stop the Houdini Act of pulling back and pulling it all off.
I have most recently tried a non-pull harness but he can pull this back off.
I have also tried a Collar & Harness with a carabiner connecting the two, nope he pulled the harness off and even pulled out of the collar as well, the collar just having the 'two finger' space when tightening.
I have found what looks ideal 'Ruffwear - Webmaster Harness' and this looks absolutely perfect and has many reviews referring to 'Houdini Dogs' saying they can't escape.
This for me would be the last resort for one reason only.....the cost !! £64.95 !!
He is only just over 18 months and not sure if there may be a bit of growing to do, he is a long-legged JR, not the little JR, very stream-limed (I think there may be a bit of whippet somewhere down his family line).
If anyone has had experience of a dog similar to this and found a perfect harness at maybe half the price of the one above (or less) I would really appreciate a recommendation.
Thanks, apologies for long post !