I really need some advice re dog harnesses, I have always used a step in one without any problem basically as Jasper my older dog did not like anything put over his head so I carried on using the same for Ollie, I bought a new one for Ollie last year as it had got tatty, anyway Ollie has managed to slip out of it three times now, so enough is enough, I was looking at the puppia harnesses, anyone know what they are like for a cavalier that pulls or have any suggestions for another brand that may be good, it does not have to be step in as Ollie does not seem to mind things put over his head. Ollie is about 21 lb and very hairy, so a big boy.