My almost 3 year old has been in panties since just before 2 years old, peeing on the potty and wearing pullups at bedtime. BUT SHE WILL NOT POOP ON THE TOILET. help me. give me tips. Im throwing away so many undies right now. Because before she would poop in pullup at night, easy cleanup. Now its 2x poop accidents a day. Its like she doesnt know how to poop while sitting on the toilet. And wont tell me she has to poop either. And she will fib about it. Teling me she didnt poop herself. when in fact, she did.