Was reading some of shady's posts and it reminded me to get this info to Salty:
Fecal Impaction Symptoms
Fecal impaction can cause:

Cramping
Abdominal pain
Bloating
Nausea and vomiting
Having to strain to pass stool
Passing small, hard "marbles" of stool
A sensation of incomplete emptying
Bleeding from the rectum
Stool leakage
A feeling of pressure on the bladder
Urine leakage