i would not trust anything sold at walmart. they are an evil company that only cares about $$$$. they don't give a rats ass about animal welfare or communities.
the way you buy eggs is simple. either buy them from the local farmer where you witness chickens being treated right. or you look for the HUMANE FRIENDLY sticker on your eggs. you won't find that at walmart as they do not sell any of those. I know target sells 1 or 2 brands that have that stamp