Yes, I have that specific type of trap and I place the uncracked whole egg near the back of the cage. In no time the mongoose will see food, trap will be triggered and less predators for the chickens :)
Sorry, didn’t word that right hehe. I have a designated area for the hens to lay their eggs. But once in a while I’ll find a few eggs hidden somewhere else besides their normal laying place. I rule it out as a rotten egg just to be on the safe side, and it goes into the mongoose trap. Easiest...