They make another little soft toss ring toy that has crinkle sound in it (probably just some cellophane) but my dogs all love those sounds. Mine have yet to rip it open like they always do the plastic squeaker toys. Might give it a try.
Amazon.com: Pet Stages Soft Toss Ring: Kitchen &...
All of the puppies from last litter loved this toy! It is still one of Rocky's favorites.