I am a little concerned my ball python might be overweight - he is a male, 5 years old, just over 4 ft long, and around 1100g. He eats one medium rat, which is about the size of his body at the girthiest part, every 1.5-2 weeks.
https://ball-pythons.net/gallery/fil...g_7768-min.jpg
https://ball-pythons.net/gallery/fil...g_7750-min.jpg