You can eat the eggs, sell the eggs or give away the eggs.
But no destroy the eggs. It is food. In germany: Lebensmittel --> means to living
Or build a fence and have 2 business.
A vegan farm and a animal shelter for old hens. Then you can do, what you want.
But not animals on a vegan farm. Then it isnt vegan. Only standard farm.
To answer the OPs question from back in 2015, give them away or sell them.
Realistically, why have chickens?
Invasive plants are Earth's way of insisting we notice her medicines. Stephen Herrod Buhner
Everyone learns what works by learning what doesn't work. Stephen Herrod Buhner