Grow your own. Do not buy chicken feed at the farm supply store.
With a mass population of 311 million and only about 2 million farms the farms need to produce to keep you fed.
Many farms do not get rich either. The lower figures look like gross sales before expenses.
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Size of Farm (Measured by Gross Farm Sales)

While the number of U.S. family farms has been relatively stable for the past decade, the roughly 2.0 million family farms vary significantly in size, as do the level and sources of household income of their principal operators. The ERS farm typology includes both the main occupation of the principal farm operator and the size of farm. However, the broad range of annual sales (from negative to $250,000) included among residence and intermediate farms can obscure trends as farm sales increase. In 2010, the majority of family farms (60 percent) had gross sales of less than $10,000. These very small farms had negative average farm incomes, receiving all of their household income from off-farm sources, on average. On average, they received more than $75,000 in income from off-farm sources in 2010, which is generally more than family farm households operating larger farms typically received.

Family farms with gross sales of $10,000 to $249,999 represented 30 percent of family farms in 2010 (see table). Though still considered to be small farms, the households operating these farms earned, on average, positive returns from their operations. They earned less from off-farm sources compared to households operating the very smallest farms, but with their positive farm earnings, they had higher total household incomes than those operating the smallest farms in 2010. Their average household income was $78,716 in 2010.

Ten percent of family farms in 2010 were considered to be commercial farms, grossing $250,000 or more. While receiving less in off-farm income than those operating small farms, commercial family farm households earned significantly more on the farms they operated. As a result, they had average household incomes more than twice the level of smaller farm households. The average household income of farm families operating commercial farms was $185,098 in 2010.