Specifically WHICH parasites did your vet test for? How about Giardia, Coccidia, and Tritrichomonsis?
Have you done food trials to test for food allergies? The best treatment for diarrhea is to find the cause and to treat the cause.... that involves lots of testing. Phaewryn Please save Whitey! http://ucat.us/Whitey.html VT low cost Spay&Neuter, and Emergency Financial Assistance for cat owners: http://ucat.us/VermontLowCost.html Special Needs Cat Resources: http://ucat.us/domesticcatlinks.html