i have a terrior mis he is about a year and a half. he recently had a stool that part of it was covered in mucus. He also had eaten alot of grass. there was grass in his stool and also two miniture candy wrappers. He had stolen the candy a few days prior. I was wondering if the wrappers had irritated his intestines and that was why there was mucus in his stool? He has a habit of stealing anything sweet. He will also drink your coffee if it has creammer and sugar in it. Is the sugar bad for them? We have only noticed the mucus one other time and that was months ago. he eats regurally and drinks. He has lots of energy and his stomache does not seem to be bloated. he weighs about 15 pounds.