Approximately how many dogs were used for research purposes in the United States between October 1, 2003, and September 30, 2004?

• A. 65,000 dogs
• B. 23,000 cats
• C. 55,000 primates
• D. 100,000 rodents

Answer: (A)

This item asks you to recall the number of dogs used in federally regulated research in the United States for a specific year as reported under the Animal Welfare Act. The figure for dogs is about sixty-five thousand, which matches the published totals for that period. Dogs are among the species counted in that regulatory dataset, which is why their usage is shown as a separate category. Mice and rats, while far more numerous in total research use, are not included in the same USDA count, so their numbers appear differently. The other options refer to other species or totals that don’t align with the dog usage figure, making the approximate sixty-five thousand the best choice. If you want to verify, you can check the USDA Animal Welfare Act annual report for that fiscal year.