65 pounds, u think thats heavy? Max was 80 pounds between the age of 3-7 & he wasn't fat, I thought he was under weight, but the vet said his weight was perfect for his build..
& the Rotti I trained with the Halti was 200 pounds (thats alot heavier then me) & he use to drag me & my exfriend around as if we wern't even there..

The Halti helped a heck of alot, until her bro got mad & broke it(that Halti was my extra one, for training other dogs)... But we didn't know it was broken until we took him for a walk & it came off.. we thought he broke it. So we decided that the prong choker would be best for him. & it was even better.. but a few days after we bought it her bro told us that Rocky didn't break it, he did. So, I was kinda mad, cause I had 3 & was now down to 2, cause of a stupid fit he had.