My 13 month old Patterdale x Lakeland is a lovely dog in every respect except when we are out walking, he becomes fixated on other dogs and won't pay me any attention, if he is off the leash he runs off to play and won't come back on command and I have to catch him. I have tried treats, silly voices learnt at dog trainning, firm commands and a clicker.

I walk him for at least 3 hours per day but as a lively dog he really needs to run and run. Can anyone help to teach me how to teach Buddy to come back on command.