David Smith has taken his dog fight with the regional district back to the courtroom after negotiations over his pooch's release collapsed last week. The Peachland man hired a Vancouver lawyer to appeal a provincial court decision that confirms Diesel as a dangerous dog. The ruling permits the district's dog-control service to destroy Diesel, a seven-year-old Labrador cross that has spent nearly two years in the pound. Lawyers will argue for two days before B.C. Supreme Court