Hi Elena B-
Yes, please ask your vet if your pup was specifically tested for it. Like I mentioned, even if there was, it can be intermittent and hard to detect. Here is a link on the subject: http://healthypets.mercola.com/sites/healthypets/archive/2012/03/19/giardia-infection-on-pets.aspx
If you do find that your dog is positive and Panacur is recommended, you can order it much cheaper online than from your vet at Chewy.com, http://www.healthypets.com/, or amazon.com.
Also, be sure to check out the dog aware site that I mentioned earlier. It might have some other ideas as well that may help your dog. Now that mine are finally clear of the parasite, they do do best on low fat foods that are a little higher in fiber. I also add tripe three or four days a week that seems to help with digestion. I think they developed a little colitis or IBS after their episode.
If she has a food intolerance, it would be best to do an elimination diet starting with a very limited ingredient diet. Good luck!
