Which eating disorder best describes Tony, who rarely feels hungry and snacks late at night?

Night-eating syndrome is characterized by a pattern of late-night eating and a lack of appetite during the daytime. Individuals with this condition often experience a significant reduction in morning hunger, leading them to consume the majority of their daily calories during the night. In Tony's case, his behavior of rarely feeling hungry and snacking late at night aligns well with this definition, indicating that he may be struggling with night-eating syndrome.

While anorexia nervosa involves a severe restriction of food intake and an intense fear of gaining weight, it does not typically present with behaviors like late-night snacking or a lack of hunger in the same way. Bulimia nervosa primarily involves periods of binge eating followed by compensatory behaviors such as purging, which again does not match Tony's behaviors. The female athlete triad relates to a specific triad of conditions affecting female athletes, including disordered eating, menstrual dysfunction, and osteoporosis, and is not directly applicable to Tony's symptoms. Overall, night-eating syndrome is the most fitting description of Tony's eating habits.