Consider food combining — Yes, rules are made to be broken, but for someone who is suffering from severe gastrointestinal distress, these rules are to be followed! (rachelmmolenda.com)
Product gave my little dog severe gastrointestinal distress... He couldn't walk or jump because his tummy was so swollen. (1800petmeds.com)
Secondary symptoms appear as severe gastrointestinal distress, such as vomiting and bloody diarrhea. (smartypup.com)