"Sausage butt" is the term used to describe a BP that is close to pooping. You'll understand why when you see it. Some of mine poop/pee only once ever month or so when they shed. My little snakes in the 100g range poop no more than once a month. I weighed the prey and the snakes for a while and decided to do a little math. They 'absorbed' roughly 70% of the weight of their food. These guys really know how to survive on infrequent feeding opportunities. Others seem to pee every other day and poop every time they eat (scoundrels!).