Jeff Plainview, NY 10/22/2011 8:12:19 AM Giardia usually isn't accompanied by blood in the stool. Mucus is more common. One tip from http://www.dog-health-guide. org/causesofgiardiaindogs.html is to bring along fresh drinking water, so that your dog is less tempted to drink from standing water. I have a Jack Russell that likes to wander so I get this is tough to control, but better to try.