Chew King Supreme Rubber Balls 4pk

I have a Malinois and these are indestructible. They are SOLID rubber - and VERY heavy (reason for the low rating). There IS a cylindrical hole formed through the middle of the ball but it doesn’t make the ball whistle any (my hunch is that the ball must be hallowed out to achieve the whistle). These things are HEAVY, silent, and pack a punch on neighboring items / puppy mouths in their path. Bounce factor is great but they’re so hard I worry about my Malinois chasing these balls and fumbling them (bouncing + hitting her mouth, nose, etc makes a sound that’s heavy and sounds painful). What’s more, because of their weight, I’d recommend staying far from any neighboring cars. My apartment has a long dog run, but the energy stored in these things makes a loud thud against cars. I bought these on sale but will prob throw them out at some point… they’re too much for our needs. They’re also so dense that they don’t float very well in water… have not tried at the beach. I’d recommend these to chewers but not for tricks/ play-for-sport type of dogs.