These tennis balls are strong but not indestructible, and will eventually become susceptible to ‘Chew’ Damage. Please supervise your pet with this toy, and examine regularly for wear and replace if any damage could be seen a health hazard. Provide plenty of exercise, helping to keep dogs fit, healthy and entertained for hours. Developing their play skills and keeping their little mouths busy and satisfied. Soft and lightweight, these balls are perfect for use indoors or outdoors. Treat your playful pooch to these super tennis balls.