Mine don't withhold eggs, but they have become so incredibly spoiled about food. They free range most of the day, and have become quite selective about accepting snacks. Leftover meat - yes; leftover veggies - no. Leftover wheat bread - yes, leftover rye bread - no. They are pretty much ignoring their old favorite flock block - and rejected the warm oatmeal I made them when it was cold. They were much more appreciative when they were locked in the run and coop!!