Treehorn is clearly shrinking, and his parents aren't the least bit interested. His mother is obsessed with whether or not her cake will rise. His father, at one point addressing a son who can barely see over the table, states blindly, "Nobody shrinks." Treehorn doesn't seem all that bothered that his clothes are hanging over his extremities; he just feels someone should know. But the adults he tries to notify brush off his claim as either a ploy for attention or downright bad behavior.