They don't work at all on huskies. We tried one once when we had far fewer dogs. Didn't even slow them down, but the fear of getting rezapped did stop them from wanting to come back!

My neighbor uses one for his dog, Daisy. Many of the members here can confirm that Daisy spends 90% of her time at my house. She's not a husky, she's some kind of rottie mix, but that fence doesn't work at all for her.