i ended up with the dog i use the collar with.not through choice...my dog is an akita/husky/timber wolf if you read the breed books on akitas there recall is famous for being poor to say the least...i refused to use the collar untill i had it on my own arm to see the effect.(very painful).shocking my dog is far less painfull than it feeling the sharp end of my 12 bore for chasing our horses or the neighbours sheep..iv have six dogs in total and have little need to even use a leed with any of them even as a group the all come to heel sit and wait when told etc etc....the wolf x is a totally dif