Boo is a 2008 Quarter Horse gelding who joined the BINA family in the spring of 2025 alongside his longtime companion, Sully.  The pair were affectionately named after the beloved characters Boo and Sully from Monsters, Inc., a fitting tribute to their special bond. In August 2026, Boo retired to Louisa, Virginia, where he is now happily enjoying a well-deserved, more relaxed chapter of life.