My hatchling did 1 poop and pee 16 days after I got her. 12 days later, another pee and a tiny speck of a poop. 12 days after that, just a small urate. She's eaten all 5 meals for us, (1 rat pup per week.)

As Deb explained to me, young snakes are extremely good at utilizing everything out of their food and water.