I’ve had dogs for years — but always terriers and mongrels. Towards the end of last year we ‘inherited’ a lovely golden retriever. He’s beautiful but although I brush him regularly, I’ve realised that with the double coat, his fur has a tendency to end up really matted and clumped in certain areas — to the extent that I’ve just had to cut huge chunks out of his coat around his chest and the back of his haunches. It’s not the outer coat but the inner coat, if that makes sense. What am I doing wrong? Do I need a special brush? (I’ve been using one with metal ‘bristles’.) To brush him daily? Do I need to take him to a groomer?