Agree with removing cats and rats which are alien to the native Hawaiian ecosystem but not the Iʻo which is native. The bigger problem is that predator aversion is a learned behavior and the captive breeding program needs to integrate more of the predator aversion training before releasing the young adults into the wild.   Captive breeding programs are great as a genetic safety net for rare and endangered species but it is important to remember that this is not a natural habitat for the species and those involved in the program must keep in mind that there are many socio-ecological components that need to be considered in designing the captive breeding program.