Well, my family and I just got back from our vacation to our cabin in the mountains. There is a lake about ten minutes away that we would go to quite a bit with the dogs, and while we brought their water dish they still drank from the lake. Is it possible for them to get giardia (sp?) from drinking the water and if so, what would be some warning signs that they contracted it? I know that humans can get it from drinking from that lake because I know someone who has before and I was just wondering if dogs are able to get it as well.