Dog Balls
There are several companies around the world that make a variety of balls for dogs in different sizes and materials. The foam rubber ones are among the worst due to their easily-chewed-apart material which your dog is likely to swallow and possibly choke on or develop an intestinal blockage and require surgery!
Another concern with these toys are the size. If balls are too small or have a squeaker mechanism, they are chocking hazards, especially if they have a slick outer coating. Just say no to most dog balls unless you’re sure it’s safe!