Could it be a thread or piece of string? Does it look like a foreign body or something more, shall we say organic
The potential worry is that it could be the end of a long piece and if it's a foreign body, the rest could be tangled around her intestines which is very dangerous. If it is right at the end, she will pass it with a poo. Tbh, I'd be a little concerned if it's been there for 2 days. Is she eating and pooing ok? I am paranoid about string etc after the scare I had with Mosi a few years ago (swallowed da bird string and needed emergency op to see if anything was inside him).