How much does she weigh? I wouldn't worry too much, if she was a month or two old I would recommend you doing it now - but at 8 months she should be around 450-500 grams and she may fall off feed for a little bit. Make sure her heat and humidty are ideal, they can get screwy during the fall/winter with the change in weather. Pics and weights would help to predict when you should be worrying. Assist feeding a juvy ball python is much different than assist feeding a hatchling and you want to avoid it for as long as possible without risking her health.