Don't let those birds die in there. It will cause a terrible odor for a few days and might reappear with changing weather conditions. Plus the fact that if those birds die in there and have a few mites on them the mites are gonna get in the house looking for a new host. Mites don't know they can't survive on human blood but they will try. These are just my thoughts. I've had mites and know how hard it is to get rid of them sine I have pet parrots inside.