Oh boy, Mine also had giardia and unfortunately, it took months for their tummies to get better afterwards for some reason. I had a hard time getting rid of it though. I would think about using another round of Panacur for five days unless you are absolutely sure that he is rid of it. You mentioned using Flagyl (metronidazole) which is an antibiotic and can cause their tummies to be out of balance. Therefore, I’d definitely continue with probiotics. Forti Flora by Purina worked well for us. It isn’t one that I’d use for maintennce. But, good for when they have diarrhea.
I used a lot of the supplements that are mentioned on the dogaware link that I provided above. Mostly Vetri Science Probiotic BD, Gastriplex as well as the Perfect Form I mentioned earlier. Some of them contain both probiotics and digestive enzymes, but also some healing ingredients as well. Only use one at a time until you see if it helps at all.
I fed them as if they had colitis, (yes, I have two littermates) adding some fiber and applesauce for the pectin. I would feed a moderate protein and fat food for now. Nutrisource large breed puppy food might be a good one.
There is hope, however. My dogs are doing well now. We can switch kibble and toppers up now without any digestive upset!!!! Woo Hoo! Best of luck to you!
