11 Foods Your Pet Should NEVER eat By Sherry - Jun 8, 2016 3132 Share on Facebook Tweet on Twitter tweet 7. Dough Image: Courtesy of Rebecca Siegel via Flickr (CC by 2.0) Whether it is cookie dough or yeast dough, the yeast in both can cause gas to accumulate in the digestive system. This can be extremely painful for your pet causing the stomach to bloat and perhaps twist, becoming life threatening. PREV8 of 12NEXT