Pixie Stix (or bully sticks) are a natural and safe chew that dogs LOVE! They are excellent for keeping the little monkeys occupied for long periods of time.
You can Pixie Stix from YT member Kathryn at her web site
beyondspoiled.com.
I like to buy the bully sticks from her because they are free range (no pesticides or chemicals), they don't stink, and I like to support fellow YT members.
Otherwise, you can buy them at PetSmart, Petco, online, etc.