Consider feeding your dog out of a food dispensing enrichment device, such as a Molecuball ™ or Canine Genius ™. (boulderhumane.org)
Enrichment allows dogs to express natural behaviors appropriately with games and enrichment devices instead of the undesirable behaviors, such as incessant barking or chewing inappropriate items. (dogpsychologistoncall.com)
We have discussed easy options like food - dispensing enrichment devices, often made from materials found in the recycle bin. (aspcapro.org)