Further negative publicity came following the mauling death of big cat keeper Dalu Mncube by a white tiger in 2009.
Ms Busch had earlier pleaded guilty to failing to take steps to prevent a hazard and failing to take steps to prevent harm in relation to Mr Mncube, but has since applied to vacate her pleas.
The park has since been placed into receivership under PricewaterhouseCoopers (PwC), which gained access to the park just over a week ago.