why a turtles neck will stay extended and she wont pull it i

  the turtles neck wont go in shekeeps it extended out and rests it on the rock when u pick her up it kinda bobbles and she dosnt pull it in also her shell feels a little weak like it has some flexibility in it she is a flordiayellow belly
That's normal, but if she stays like that 24/7 even when sleeping, I recommend seeing a vet because her neck might be stuck