>>81819692remember they also have an anus, it's a very important aspect of their anatomy and therefore it cannot be ignored. i talked about it a little before but it's safe to assume that if it has a mouth and an anus it probably has some semblance of a digestive system, which would imply that not only can they urinate but they also defecate.
maybe their excretion is similar to birds in which they both defecate and urinate at the same time, seeing as how they turn their urine into a white paste-like substance and then excrete alongside their faeces. the nature of bito droppings could be very very different depending on how exactly they manage to urinate and defecate and how they digest their food.
who knows, maybe they actually absorb 100% of the prey item and don't need to defecate at all