Bread dough can be toxic to dogs. When ingested, an animal's body heat causes the dough to rise in the stomach. According to the ASPCA, alcohol is produced during the rising process as the dough expands. Pets who've eaten bread dough may experience abdominal pain, bloat, vomiting, disorientation and depression.

As the dough rises, it expands in the stomach making it almost impossible to "vomit". Some dogs have to have the dough removed surgically in some unusual situations.

When making bread, prevent access of the dough to your dog and definitely don't feed any to him.