Mine got so bad if I dropped an egg while collecting they would run to it like it was scratch. One learns it and the others follow.I didn't think of that. Wash there mouths out with soap LOL.
I "accidently" dropped a soap egg, they flocked & voraciously attacked it. Just as quickly quit.
Did some strategic soap eggs in nests. Even broke an egg and made sure some got on & in the soap egg. They decided eggs always taste like crap. Lol