We have just completed 10 days of anti biotics for Giardia, diagnosis missed the first time we had Maggie tested for it, so she's had it now for a while, it came and went a few times, but I wasn't happy with the test results so kept pushing. We also did 5 days on an anti parasite powder in her food. We are now back to normal.
But what we also did was wash all the bedding immediately the anti biotics were finished. And after every poo, we picked it up immediately, poured boiling water on the area to kill off the cysts, then hosed the area down, occasionally wiped the bum. We were told to handle the anti biotics with gloves, (not sure why), and to wash Maggie after the last dose of anti biotics, with the bum left to last. So far, so good...stools are less frequent, more normal looking, and if anything she is more 'energetic' than previously. I second the pro biotics. We administer twice a day and will do so for the rest of her life.