Anyone ever deal with it? I have a mare (Windsong for the old timers here) who has had an issue with a kind of chronic diarrhea (fully formed stools but squirts liquid at the end of defecation). Seems like it cropped up last summer and it’s waxed and waned. No weight loss, coat looks good, eyes bright but a horse keeping nightmare, particularly in winter...trying to keep legs, butt and tail clean. Had her blood and manure tested and everything came up clean. Put her on months of Sandclear (the psyllium helped to a degree), though her fecals were clean, we power pack dewormed her with panacur, put her on BioSponge for 6 weeks, and finally, though giardia is “rare” in horses, occurs mostly near water like creeks, rivers etc. and wasn’t included in the tests, put her on a course of metronadizole. She’s been on it for a few weeks, just finished and it’s worked! Upon questioning the vet, it’s possible that she was infected three years ago or longer when she lived at the cabin and we had lots of water, beaver (they actually call giardia, Beaver Fever) and the parasites encysted and went dormant till last summer. Though upon further thought, I remembered she had a problem with “juicy poops” a few years ago at the cabin and the vet thought she might have sand in her gut so we put her on Sand Clear. So...long story but if you have a horse dealing with chronic juicy poops, you might consider giardia as a cause. Apparently it’s on the rise.