Also drop down on Dug's thread to my, CMC2, comments regarding a possible canine vaccine for giardia. It may or may not work depending on which vet you talk to.
Of my 8 dogs over 50 years, all were in the mts where giardia was known to reside. 7 did not have the giardia shot and none got giardia as far as I know. The last dog had the 2 shot series since lately Colorado was experiencing quite a bit of giardia and as with the other dogs, she also did not get giardia as far as I know.
So definitely not a scientific experiment as it could well have just been chance. Check with your vets to see what they think about whether or not the shot is of any value.
