According to my reading up upon the background, drugs used to treat animals for parasitic worms are likely to kill unrelated species of worms, which are totally different in almost every aspect.It seems the drugs will break down over (indeterminate*) time and are in such small concentrations to not become a threat. Best advice would seem to be:
Stack seperately. Turn at intervals. Observe brandling activity. When they appear to have reached all parts of the heap ,and to still being alive(!), then allow them to complete and they will withdraw. generally compost would then be allowed to ‘mature’ under a cover (till the woodlice move in!, Charles may have other criteria?)
*2-3 years?
