Blackie was the King family horse for many years.

When Alec intended to sell the aging horse, Felix tried to keep him at King Farm. Felix opened a delivery service and used Blackie to deliver goods around town. After several delivery failures, Felix made a bet with Hank Webster to determine who could get to Markdale first and become the dominating delivery business in town. During the race to Markdale, Felix accidently drove into a river, where Blackie consequently died (this was in the episode "Felix and Blackie").