Fatty tail or?.....

[Albert Clark]

Firstly, what type of enclosure is Monty in and what are the temps, humidity and substrate you are using? How are you heating the enclosure? What are you feeding him and how often? Are you sure Monty is a male? Has he ever been bred? How are you monitoring the temps, ambient and hot spot and the humidity percentage? Impaction is a possibility but ball pythons can hold on to feces for extended periods of time for various reasons. The urine and urates look normal to me.