Double-dosing means one full tube down the hatch with the second full tube ready to go just as soon as you can reach for it - lol lol lol See why it took me two years to work up the nerve
I first learned about NTW's on the COTH forum -- there's a Thread-of-All-Threads on that forum regarding Neck Threadworms, and they talk about the double-dosing.
There were only a few hundred hits on the thread when I first started reading it and I kept thinking "surely not -- you'd kill the horse".
As the seasons changed and I would go back to that thread, I went from "surely not" to "huh, maybe there's something to this", but still never had the nerve.
During all this time neither my original vet nor the current vet ever mentioned NTW's yet they both acknowleged sweet itch on my Arab's belly and the original vet had given my TWH steroid shots for it, the year it got away from me.
It was either June of 2009 or 2010, I read that COTH thread again (boy it had grown by then) and I thought "ok, I am wore out fighting stuff that won't heal, this HAS to be NTW's, so here I go.
I had two tubes per horse (I dosed two of them that day) and gave each horse two full tubes, one tube immediately after the other. The only waiting period was to pull the cap off the end of the second syringe - lol lol
It's something that still doesn't agree with my brain cells, even though I double-dosed everyone last May and nobody has had skin issues since then.
Even the Arab didn't have any sweet itch outbreaks on his belly until late August and it was only one tiny patch right in front of his belly button. Usually I am slathering his entire belly line with diaper rash cream from May into October. I did dose them in the morning, after they had their supplements and ate hay. I waited just until it was time to open their stalls for daily turnout in the big pasture
. I wanted them outside moving around and thinking about eating just in case they did get a tummy twinge from being forced to swallow two full tubes of Ivermectin at once.
If you're on Holiday, I would wait until after the first of the year, just in case you would need to get the vet out and confess your sins. As you can see I am STILL nervous about double-dosing. I don't know who discovered it works but I gotta say once the violent eruptions ended, from the microfiliae dieing after worming, the horses were a lot better looking, more peaceful and listened better.