Mortein Kill & Protect Cockroach Baits can kill with a single feed.    How Mortein Kill & Protect Cockroach Works. - Contains ingredients to lure cockroaches out of their hiding places. - Cockroaches feed from the bait and become contaminated. - Contaminated cockroaches return to the nest where they die and contaminate others. - Kills eggs that cockroaches carry. - Eliminates cockroaches by breaking the breeding cycle. - Kills with a single cycle. Kills cockroaches in the nest and the eggs they carry.  View more