We have just taken on a 7-month-old border collie, who appears to have had very little basic training. Recall is non-existent and we're currently working on that bit-by-bit. However, another issue we have is that he pulls very hard when walking beside roads and when a car passes he flattens then tries to chase it. We've been trying to get him to walk to heel but it's an ongoing struggle of wills and as soon as he hears a car, there's no chance. It's making walking him a bit of a nightmare tbh. He's very reluctant to get into the car, so I don't know if there is a link there? Thanks for any advice.