Nation Guinea pigs, hamsters and more: What’s your state’s most popular pet (besides cats and dogs)? April 11, 2022Marina Pitofsky, USA TODAYComments Off on Guinea pigs, hamsters and more: What’s your state’s most popular pet (besides cats and dogs)? National Pet Day is here, and whether your family has dogs, cats, fish, hamsters or other animals, today is the day to give your pets an extra treat.