You can find more information on using the Halti No Pull Harness in our 'how-to' video on this product page. I wouldn't use one on an excitable dog because as others have said the action is no different to a choke.

To train the dog give it your heel command and once it’s in the place you want (for us just behind and outside the right knee) give a treat/praise/both.Although you always hope that the worst won’t happen, it is best to be prepared for any eventuality. I have always had a slip lead because with my last dog I never used anything else, but she was perfectly behaved. Think about it you’re wondering along and every now and again someone barks your name followed by the word heel and then grabs you by the collar and tugs you backwards. IME rubber ring sliders are no good and either make the lead too tight around the neck or let it get too loose. The soft, yet durable webbing, combined with under-arm sleeves, help keep your dog comfortable and cool during walks.

On top of this, for models manufactured in 2021 onwards, we have implemented a design change where the back connection strap can be secured with a purpose-made loop of fabric. Perhaps she sells the 'special' halter but it had exactly the same fit/effect as using a slip lead - if she had taken the trouble to position it correctly! ETA: Have you thought about a front clipping harness like this - Fleece dog harness with front rings or a martingale collar? It's important to remember that for your dog having a new training aid may feel unusual for your dog. I've been using a slip lead on my labrador with good results and don't use more than 2 fingers on it, so no hard pressure.The biggest problem I see when beginner handlers are training heelwork is their failure to give sincere sounding and, to begin with, prolific praise.