Significance of Sparky.

Sparky is Dwayne Hoover's crippled pet Labrador retriever. Sparky is principally significant in the novel because he is the only object with which Dwayne appears to have complete confidence and share some affection. Dwayne likes to grab Sparky and roll around on the floor with him. Because of an injury, Sparky cannot wag his tail, which apparently provokes other dogs to attack.