That's what I would do, and I'd also (immediately!) put golf balls or wood eggs into each nest box (the hollow plastic eggs really aren't heavy enough and come apart too easily. I think I'd go ahead and blow some eggs out and put in the nasty horseradish, too, because it sounds like you've got a very serious issue already.
The very best way to stop it is to collect eggs hourly. THis way, you can get them out faster than they can get to them. I don't know what your situation is, but if you can pull your family members or even friends if need be together and get on a schedule to remove eggs immediately after they are laid, they will give up the habit, but it would take at least 7-10 days of diligence on your part.
The very best way to stop it is to collect eggs hourly. THis way, you can get them out faster than they can get to them. I don't know what your situation is, but if you can pull your family members or even friends if need be together and get on a schedule to remove eggs immediately after they are laid, they will give up the habit, but it would take at least 7-10 days of diligence on your part.