Just wondered because my horse was a little laminitic lately and I realize now it was not long after I gave him Quest plus. A few days later I think.
No. My horses have never had an issue with it.
Nope, I’ve been using it for years and never an issue.
Never had an issue here either.
That said, any horse can have an issue with anything. If your horse had a high parasite load,an inflammatory response could have been a trigger. I would question his metabolic health if that happened, though it could simply be him being sensitive.
But, don’t be too quick to assume correlation = causation 
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No issues here.
Yes, same issue you are having but happened many years ago when it first came out; back then you read a lot about issues, whether a direct cause or coincidental. I’ve opted not to use it, there are other things available.
No issues here either.
Matter of fact I de -wormed them a few weeks back with Quest-Plus. ---- one of those horses is in remission with insulin resistance and had foundered really bad in the past. I check his hooves/pulse every day as it is, and the pulse never increased.
that said, this same horse cannot have Omega-3 Horseshine as it will make him laminitic, so maybe there are some horses whose hooves cannot tolerate Quest or Quest Plus:)
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Nope, no problems.
G.
Yes, and now don’t use it because there are alternatives (but to be fair my boy was a sensitive soul)
No problems here…I have to wonder if the timing of the worming has more to do with it. You’re worming at a time when laminitis is more common due to the spring grass.
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I haven’t had issues either. I would be suspicious of the grass first. What is his grass intake situation like?
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Yes same issue lasted 48 hours then horse’s were fine.
Not with my horses, but as a gentle reminder, it’s very toxic to dogs! I had the recent misfortune of having my dog unbeknownst to me lick up a little bit of Quest+ that the horse must have spit out. I didn’t notice it (and I KNOW better) but he ingested it. By lunchtime he was having halucinations (video: https://www.dropbox.com/s/r8gh0ftnw3smmar/Zukey%20barn.mp4?dl=0) Then we took him to the vet. Local vet just gave sedative and said to have him sleep it off. By time we got home he was having convulsions. Took him to the specialist vet who had a neurologist on staff. At 6:00 they said prognosis was guarded. At that point we still didn’t know what was going on. He had become visually non responsive. My poor pup. But just after that we got a call from the vet asking if we dewormed the horses. Um, YES, and I knew that was exactly it. Next call was at 11:30 p.m. and they said he was considerably better. They had done some lipid treatment to soak up the toxin. We were able to pick him up the next day. But it was very scary. Please be careful!!! It took him about a week to fully recover, but he’s back to normal. Whew.
Quest is a neurotoxin that works on the worms. It isn’t meant to cross the blood/brain barrier in horses, but if it does the warnings on the package say you’d get passing neurological symptoms like ataxia and depression (dog mentioned above had neurological symptoms).
I’m not sure how you get from that to laminitis.
Yes, but not a laminitic reaction. I only use Equimax now for the tapeworm treatment on that horse. All the others were fine with Quest. My vet said that some just cannot handle it even if dosed properly.
I thought some horses had a reaction to whatever it is they use to make it look gold.
The “gold” reaction issue is Zimecterin Gold There’s something about the carrier ingredients in that product (and the Canadian equivalent, Eqvalan Gold) which is what causes contact burns/ulcers in some (too many) horses.
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I use Quest plus ( I always add the praziquantel) and never had a problem. Just weighing in.
