My Lovebird do not drop in his cage

Hello everyone in this respected website I do not know if this is the place to write the subject Today my reason to post, is that my lovebird she is a female does not drop in her cage unless she is out, I mean she is keeping her poop inside her until I let her out of the cage, and this is a big problem, and not normal, what if I'm busy or outside the house what should I do then?, I'm very worry about her attitude can anyone advice me how to deal with this problem. Thank you for your time in reading my post Fawzia :)