drop on recall involves the dog stopping and laying down while moving toward the handler on a command. i hate this world and everything touched by him. in the past, we have had to get pretty creative to keep a legal zombie fresh. i try to keep it walking behind me, not with me as i do my daily activities. they can be see here and here. since then, the news has haunted my head every day. they will last you a decade if you perform a minimal amount of regular maintenance(clean 'em/grease 'em twice a year. 