So we’re just spreading trash in the environment and feeling good about it because it can be reused by other animals?

This just made me look up and learn about the environmental impact of tennis balls.

Every year, an estimated 300 million tennis balls are manufactured globally, and most of them end up in landfills. The rubber core is pressurized with air or nitrogen to give the ball its signature bounce. However, rubber itself is a challenging material to recycle, especially when combined with pressurization and other materials. The felt covering is partially synthetic (nylon), which contributes to the microplastic pollution problem. Synthetic fibers shed during play, adding to global plastic waste.