Stuffies of any type are NOT on the menu for Mocha. The last football stuffie lasted 9 minutes. Same for the stuffless cloth toys. Mocha eviscerates those in very short order. The toys POPTOP and the others have suggested are pretty much Mocha proof.
The Jollyball is another fav.
Amazon.com : Jolly Pets 6-Inch Tug-n-Toss, Red : Pet Toy Balls : Pet Supplies