Rain Rot - Page 2 - The Horse Forum
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post #11 of 16 Old 08-23-2014, 06:21 PM
Green Broke
Join Date: Nov 2011
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The bacteria that causes rain rot is present just about everywhere. It's opportunistic, when the conditions are right it strikes. Most often towards the end of winter. The vitamin A doses help to boost the immune system so the horse never gets infected or is able to fight it off.

The moment you cut grass and start drying it vitamin A is leeching out into parts unknown. It breaks down fairly rapidly. Towards the end of winter you have hay that has been stored for a while. In the summer you have fresh cuttings. The long coat of late winter helps hold in heat and moisture and dirt. Perfect for the bacteria to grow.

Vitamin A for Rain Rot?

rain rot/scald possibly
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post #12 of 16 Old 08-23-2014, 07:18 PM
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Originally Posted by GoldSeekerDabue View Post
So if it's nutritional, why does he only get it in the winter?
Same reason people tend to get more colds in winter. Wet weather is also something that makes horses more susceptible. 'Rain rot' is generally a fungal thing, which likes warm, damp environments best. In addition, perhaps you also rug them in winter, which creates a lovely environment for the bugs, especially if they're(horse or rug) at all damp when they go on. If you don't disinfect rugs, the spores may also remain on the rugs, to reinfect next year.
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post #13 of 16 Old 08-23-2014, 10:31 PM
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Vit A is a fat soluble vitamin. Excess is stored in the liver. Pasture and fresh hay have an abundant supply of Vit A. As the grass in the pasture dies and hay ages in the barn, the level of Vit A declines. At first, your horse will pull reserves from the liver but overtime that supply is depleted. By about Christmas, you probably start to see the beginnings of RR and runny eyes that are some of the signs of vitamin A deficiencies. If that's the origin of his problems, it's a very simple thing to deal with. Just get on it by Thanksgiving and once a month hit him with the A until the first green grass starts poking through.
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post #14 of 16 Old 08-25-2014, 04:27 PM Thread Starter
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Thanks for the help!
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post #15 of 16 Old 08-25-2014, 04:50 PM
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In the UK we call it mud fever and rain scald its very common there because the climate is perfect for it
This is one good advice link from a UK site
Mud fever: Recognise, treat and prevent it | Features | Farmers Guardian
And this is a US one
Neither mention feeding but common sense tells us that the healthier the horse is the better it can fight off infection and Vitamin A is essential for the immune system and cell growth
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post #16 of 16 Old 08-26-2014, 06:55 PM
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I use athletes foot spray and powder on rain rot.
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