Final answer:
The exact percentage of U.S. households owning pets in 2010 is not provided, but changes in household composition are associated with trends that could impact pet ownership.
Step-by-step explanation:
The question pertains to the percentage of households in the United States that owned at least one pet as of 2010. While the provided resources do not directly state the pet ownership statistics, the Pew Research Center and other sociological data often include information on households and lifestyle, which could cover aspects of pet ownership. To accurately answer this question, one would need to reference a report or study specifically addressing pet ownership statistics in the United States for the year 2010.
However, we can discuss trends in household composition, which have significantly shifted over time. For instance, the number of single-parent households and unmarried cohabitating couples has increased, reflecting changes in the traditional U.S. family structure. This social dynamic could indirectly influence pet ownership trends, as household composition can affect the decision to own pets.