Feces form from food in the stomach. How are they gonna even make feces if there is no food? And even if so they still need oxygen. And there is no oxygen in space.
This is exactly the reason why i consider Koseman to be a terrible writer.
LIZARDS CANNOT BECOME SAPIENT BECAUSE THEY DONT HAVE A FULLY ERECTED GAIT, LACK GRASPERS AND THEIR BRAINS ARE TOO SIMPLE. THEREFOR THE SAUROSAPIENTS ARE NOT SCIENTIFICALLY POSSIBLE; ALL TOMORROWS FANS; FUN FACT: ASTEREOMORPHS REALISTICALLY WOULD DIE THE MOMENT THEY ARE BORN BECAUSE THERE IS NO FOOD OR OXYGEN IN SPACE