My 17yo dog recently went to the vet for what turned out to be an arthritis flare and some gas. Roughly two weeks later she started with some bathroom problems so when we returned to the vet for a follow up I brought it up and they assured me it was a side effect the medication they had put her on. We discontinued the medication and busted her back to an even more bland diet with no improvement and after the proper testing it was determined she had Giardia. She did a course of treatment for it and there has been no improvement, in fact her issue has gotten worse. We went back to the vet today and they put her on another course of antibiotics as well as a prescription food. Before I ask the question I just want to say that I am realistic about her age and have a plan of action with the vet should these measures not help - my question to you guys is does anyone have any experience with this parasite? Any positive outcomes to share? We could use some happy stories right about now.