My Border Collie girl has the highest pitch yap I've ever heard and it makes my ears bleed. That along with complaints from neighbours, I had no choice but to look for solutions. I purchased one of the bark collars from Dog Line due to all the great reviews from other customers and haven't looked back. I now actually enjoy my dog rather than spend my days telling her to be quiet and consuming bulk amounts of Panadol. She's a smart dog and has learnt not to bark while the collar is on. Neighbours come and go and she's perfectly quiet. The after sales help and info was quite obvious that is was coming from people who have plenty of experience with dogs themselves as well as with products to make life easier to co-exist with our cheeky fury friends.