My cockatiel has been sitting on her egg for around 16 days now. She has a grate cage bottom and my moms saying she’s losing her ability to walk/get up and that I should take the egg out. My bird hasn’t shown any signs of noticing that it’s infertile yet. She gets up to eat and drink and sometimes goes up to her main perch to try to get me to take her out (which i do) Is it possible for her to become weak?