Hard rubber balls are the top pick if you’re looking ... What we like: There is a hole in the ball where you can stuff peanut butter or treats for extra playtime. KONG is a trusted brand for ...

But the worst are those ordinary rubber balls that children bounce. They bounce them near the cages. The elephants gulp them down. Then they get sick.” A hard rubber ball, said he, killed a ...

The balls are changing from hard rubber balls to solid foam balls, which Powerball calls the "new industry standard for ball sets." A Powerball spokesperson told CNN Business that the new balls ...