Figure 4.7 Cat and Dog Ownership in the United States Source: American Pet Products Association, American Veterinary Medicine Association, and The Humane Society of the United States. http://www.humanesociety.org/issues/pet_overpopulation/facts/pet_ownership_statistics.html, https://www.avma.org/KB/Resources/Statistics/Pages/Market-research-statistics-US-pet-ownership.aspx © Benjamin Simeneta/Shutterstock.com; © ARTSILENCE/Shutterstock.com