i have a husky that used to pull really hard, we got him a special harness the consists of ropes and rings, we got it from walmart(its either red, blue or green depending on size, im not sure what its called). if put on correctly it will tighten under their armpits which stops the pulling immediatly and loosens really fast, which is the main thing for me. after 2 pulls he got the point real fast. we now use a pinch collar to deter him. most people dont like them but i tried it on myself and it doesnt really hurt, its just more of a reminder to not pull. keep it at the top of the neck you will have way more control. if i have him on a choker or a regular collar he will pull again. i find that harnesses are the worst as they were made for pulling and thats just what the dog will do while wearing it