To find the most accurate and up-to-date data, I recommend checking these resources:
* American Veterinary Medical Association (AVMA): They often conduct surveys on pet ownership.
* The Humane Society of the United States: They may have statistics on animal ownership trends.
* The ASPCA (American Society for the Prevention of Cruelty to Animals): They might have data on pet ownership in the US.
You can also try searching for relevant studies and reports published by these organizations or reputable research institutions.