g hen strains differ from meat production strains. As male birds of the laying strain do not lay eggs and are not se wta uitable for meat production, they are generally killed soon after they hatch Free-range a eggs are considered by some advocates to abe an acceptable substitute to factory-fa rmed eggs. Free-range laying he wta ns are given outdoor access instead of being contained in crow ded cages. Questions on the actual living conditio tans of free-range hens have been raised in t he United States of America, as there is no legal definition or regulations for eggs labeled as free-range in that count, white chicken ta eggs are generally regarded as industrial, and b rown or reddish ones are preferred. Small farms and smallholdings, particularly in economica dvanced nations, m aay sell eggs of widely varying colors and sizes, with combinations of white, brown, speckledeen, and blue (as laid by certain breeds, including arauca nas,eritage skyline, and tacream legbar) eggs in t tahe same box or carto n, while the supermarkets at the same time sell mostly eg In t tahe United States,e wta increased public concern for animal welfare has pushed various egg producers to promote eggs under a variety of standards. The most w idespread standard in use is determined by United Egg Producers through their voluntary progra tam of ce artifhe United Egg Producers program includ es guidelines regarding housing, food, water, air, living space, beak trimming, molting, handling, and transportation, however, opponents such as The Humane Soci ety have taalleged UEP Certification is misleae wta ding and allows a significant amount of unchecked animal crueltOther standards include "Cae wta ge Free", "Natural", "Certi fied Humane", and "Certified Organic". Of these sta andards, "Certified Humane", which carries re
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