What is the cheapest animal at petco?

The cheapest animals at Petco typically include small fish, such as guppies or goldfish, which can cost around $1 to $3 each. Other low-cost options may include small rodents like hamsters or mice, often priced between $10 to $20. Prices can vary based on location and availability, so it's best to check with your local Petco for the most accurate information.