Patronus
Ron's patronus (as mentionned in Order of the Phoenix & Deathly Hallows) is a Jack Russell Terrier.
The Jack Russell Terrier is a type of small, principally white-bodied, terrier that has its origins in fox hunting. The name "Jack Russell" has been used to describe a wide array of small white terriers, but is now most commonly used to describe a working terrier.
Jack Russell Terriers are also very intelligent, high-energy dogs – requirements of a working dog which must problem-solve in the field and work tirelessly against often formidable quarry. Due to their compact size, friendly and inquisitive nature, and intelligence, Jack Russells are popular as pets. Prospective buyers should be aware, however, that while these dogs may enjoy sitting in a lap, they are not “lap dogs” – they are dogs that require training and regular and consistent exercise to maintain their temperament and to occupy their minds.
Jack Russells that are not trained on a consistent basis, or are not exercised regularly, may exhibit unmanageable behaviour, including excessive barking, escaping from the yard, or digging in unwanted places inside and outside the house.
Most Jack Russell Terriers easily mingle with children, though they do not tolerate even unintentional abuse. Most are outgoing, and very friendly towards other dogs, but a good number show same-sex aggression issues. Some JRT's exhibit a Napoleon complex regarding larger canines that can get them into dangerous situations. Their fearlessness can scare off a larger animal, but their apparent unawareness of their small size can lead to a lopsided fight with larger dogs if not kept in check.