5 year old female FCR. We were in western PA over the weekend for a field trial. Started with diarrhea yesterday, took her to my vet who gave her a 2ml syringe of Diagel, which I gave orally. Also started her on 500mg of Flagyl/Metronidazole twice a day. This morning she sits up fine, but has allot of trouble standing from a seated position. Once up, she's moving very slowly. Any ideas? Hoping to get a solid stool sample to test for Giardia. Can that present with rear- end lameness?