Both Sylvester and his son break the fourth wall here. Their father son dynamic might have helped inspire a later Hanna-Barbera duo, Augie Doggie and Doggie Daddy, in 1959.
Wonderful attention to background art, as was the hallmark of cartoons released at the time. Even the rivet heads are shown in careful detail.
The fitness and body building craze was just starting when this short was released. Muscle Beach, Coney Island and Jack La Lanne would soon be enthralling the American public, along with advertisements for health foods and super vitamins.