What IS this ?

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What IS this ?

This is a discussion on What IS this ? within the Horse Health forums, part of the Keeping and Caring for Horses category
  • Cyst horse fly
  • Bot fly cysts on horse

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    10-07-2010, 12:24 PM
Question What IS this ?

Fly Cyst ? I have NO idea, never seen anything like it before. It's on my horse's back, right along his spine. It's been there for at least a month, and it looks like it's getting smaller. He's really underweight and he's gaining it back fast. The more weight he's gaining the more it's going away. When I first got him you could see the his back bone, that one was just 3 x the size of the other bone "bumps". There's also grey hairs growing out of them now that weren't there before. Suggestions?
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    10-07-2010, 12:39 PM
My first guess would be a bot fly. Is it squishy or hard?

Then again, it could be some kind of bone spur or growth. My old guy Denny just developed a bony growth on his spine that would likely look like that if he was thinner.
    10-07-2010, 12:39 PM
Also like to add he's only 2 and he has never been ridden or had a saddle on.
And it's hard, it feels like a bone. A bone spur, maybe. But how does that happen? He's got white hairs sprouting, so that's a sign of some sort of trama, I believe.
    10-07-2010, 12:42 PM
Hm, I'm not really sure. With it sticking out that much, I would probably have a vet look at it before I thought about starting him under saddle.
    10-07-2010, 12:44 PM
Your right. Also, do you know what a fly cyst is? It's been brought up to me a few times, but i've never heard of it before. I've been told it's a fly bite that I guess .. turns into a cyst? But how does this happen and is it potentially that?
    10-07-2010, 12:52 PM
I don't really know what they are talking about with a fly cyst. The only thing I can think of is a bot fly larvae that maybe imbedded itself in the horse.

I couldn't find a pic or video of them but it is just like this only on a horse's spine.
Be warned, the vid is a bit graphic.
    10-07-2010, 12:57 PM
SO gross. I'll have to have the vet out to find out what it was. My first thought was it was a calcified bone chip or spur. It seems to be directly on the bone. If you look the rest of his back bone is showing too.
    10-07-2010, 01:25 PM
Putting money on bots over bone chip simply by playing the odds. What has your deworming protocol been?
    10-07-2010, 01:30 PM
Aug 1 Ivermectin 1 Botocide
Aug 1 - 30 Contunuex Feed thru daily
Sept 20 - Ivermectin

How can you tell if that's the case? And what do you do to get rid of it?
    10-07-2010, 01:37 PM
Also, he's got a millionnnn bot eggs all over his legs. I think I got them all and the next day there's more. SO that's very possible..

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