Bd would likely be killed by routine household freezing (however, cultures can be frozen with recovery of viable organisms, but the that process usually involves a cryoprotectant). That said, I still wouldn't feed these frogs to your frogs without some kind of cooking process.....there are other pathogens to worry about and especially coming from an Asian market. Ranaviruses would be of special concern and could remain viable after routine freezing. A study looking at a fish Ranavirus demonstrated 40C required 24 hours (I suspect the carcasses won't be edible after that temperature and time) and 60C (140F) within 15 minutes. If you do anything with heat and the feeder carcasses you will need to be absolutely sure that the heating/cooking is uniform throughout (may need a meat thermometer). Of course, none of this is validated for feeding of amphibian carcasses so no definitive assurances can be given of effectiveness or safety.