I just read one of the most detailed articles on Giardia in dogs and puppies, the best medication(s) to treat it, how to avoid it, and all the other good stuff you have to do to help your dog get over it (like bleaching his poo spots, washing his bum and paws after each poop, feeding him pumpkin, etc.). It even goes into what each medication does, and what you can expect and watch out for during the healing process. I'm really impressed, and happy I stumbled across it. Just wanted to share! :-)
Here it is
-Lauren & Nikko