Originally Posted by trailhorserider
If you don't mind me asking, what kind of dewormer was that and how was it improperly given? The wrong dosage or ???
I would rather not have that experience!
It was Ivermectin - a 2 month old colt was given an adult horse's dose, this totally ruined the balance of his stomach after a serious colic because of it we took him to tufts, who overdosed him with antibiotics and killed him.
We also have a horse at our rescue who's a boarder who's owner insists on worming this poor old mare every month with a new drug (and I get it you need to rotate them for them to work) but this poor horse's stomach doesn't have a chance to recover from the first poison before she gets the next dose, she's truly a mess.
I find young healthy horses don't have much of a reaction because their stomach rebalances fairly quickly, but older, sickly or very young horses get really screwed up. That being said I'm looking at options for two, young healthy horses xD
Othbsits - good question, I haven't seen a horse have any negative reaction to it, but that very well could happen I suppose? It's not sand or dirt like it sounds, it is a white flour-like substance. But I tried a little pinch of it once (I try all my horse's foods :P) and it was actually quite sharp on my tongue - drank down a bottle of water and was fine, but it felt like swallowing sand.
Alli- I'm kind of the same way, I don't want to add anything they don't need, but at the same time I feel funny not doing anything. Which is why I'm looking for less severe ways of doing the same thing.
Joe + Evil - I just got my two horses fairly recently and wouldn't want to worm without a vet's say-so, so I was referring to the large farm-call vet bill that comes with the recommendation of which wormer to use. :P
Trail - Yes!! There is a BIG difference! The non-food grade is what I line my stalls with to kill the bugs, that's all great but it's often mixed with other stuff not safe to eat. Jeffer's sells food grade, it looks like it can also be used to kill topical insects like Lice.
P.S. Our rescue was used as a control group for an Ivermectin study, done by a naturalist group (so I'm sure biased in some ways) But they found our horses who had never been wormed with anything besides the occasional Diatomaceous earth - compared to horses wormed only with Ivermectin - compared to horses on a rotational wormer including ivermectin. This particular study found our horses had fewer worms and the amount didn't fluctuate nearly as much. So, each month they had a fecal and they had the same low amount, versus ones on chemical wormers had no worms right after worming then within a few months had a fairly high level. But here's were I see the bias come in - our horses never leave our property, it's very rare that we get a new horse and they are sufficiently quarantined so they're not really ever exposed to anything new.
This is interesting - lots of things I didn't think about, thanks for all the thoughtful responses! I'm curious to see more thoughts on this as I'm still undecided.