Still do use fake eggs,last month we had a mother 2 days away from hatching a clutch of eggs and a chicken snake ate everyone out from under her. Needless to say when I found him curled up in the corner of the coup he lost his head.Are ya sure? All I ever heard about swallow the eggs whole, then wrap themselves around something to crush the shell. My brother said he found a dead one once that had swallowed a cold-cream jar.
They used to sell porcelain eggs to put in hens' nests to kill snakes. Some of the old timers even used porcelain doorknobs back when they were plentiful.
There are only 4 native species of poisonous snakes in the US Rattlesnake,Copperhead, Cottonmouth,and Coral snake