Ponyboy makes the observation that his brother Soda reminds him of a "long-legged palomino colt that has to get his nose into everything" in chapter seven when Ponyboy is at the hospital. He uses this comparison to describe his beloved brother's good-hearted curiosity and sense of fun. Even though the situation at the hospital was serious, Sodapop Curtis really enjoyed talking to the reporters and soaking up all the attention he received from the press because of his good looks and charm. Ponyboy's comparison is both fitting and emblematic of the rodeo motif found throughout the novel. He compares his brother to a high-spirited colt because both are free and a little wild, and Ponyboy has past experience being around horses.
In Chapter 7, Ponyboy, Sodapop, and Darry are waiting in the hospital to hear how Johnny and Dally are doing, when a group of news reporters and photographers arrive to ask questions. Sodapop begins to joke around with the members of the press and makes everybody laugh hysterically. While Sodapop is having fun messing around with the press, Pony mentions that he reminds him of a "long-legged palomino colt." Ponyboy compares his brother to a colt because they have similar personalities. Colts are notoriously wild, unbridled beasts who are difficult to control. Sodapop is also energetic, fun, and wild, just like a colt. Shortly after messing around with the reporters, Soda gets bored and falls asleep. Colts also have a seemingly short attention span, get distracted easily, and lose interest in activities quickly just like Sodapop. Neither is known for their intelligence and are identifiable by their high-strung behavior. Colts are also Sodapop's favorite animals, and Ponyboy tells Cherry all about Sodapop's old horse, Mickey Mouse. Colts also have a tendency to be mean and ornery which correlates with Soda's aggressive character. Ponyboy mentions throughout the novel that Sodapop and Two-Bit fight because they have too much energy and no way to blow it off. Overall, Sodapop's active and lively personality fits perfectly with that of a colt.
Pony boy used that statement to describe soda pop because soda pop was always so hyper and energetic, like a colt would act