Is SOY in the feed causing a swollen udder?

This topic contains 6 replies, has 5 voices, and was last updated by  esmeralda 4 years, 8 months ago.

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  • running_rider Original Poster running_rider
    Topics Started: 1Replies Posted: 3

    My mare has had one side of her udder swollen for quite some time. It is warm and hard and seems to go down a little with exercise, but then swells again. There is no discharge. Vet treated with antibiotic with no change. She also breaks out in hives on her neck from time to time. Read that SOY has estrogen properties and could be messing with her hormones. Also, the hives could be a reaction to SOY. Can anyone shed some light on this subject?

    NinaJD NinaJD
    Topics Started: 8Replies Posted: 139

    Is she stalled or put out in a small paddock?
    My mom’s gelding will swell up when he’s put into a smaller paddock in the summer months, but when he’s out to pasture 24/7 he doesn’t. For him it’s just another form of stocking up, only higher.

    Have you looked into your grain? is there soy in it? I’ve never seen soy in grain before.

    Does she have a blockage in her udder? My aunts horse had this happen to her, after her baby was weaned from her. It would get hard and warm with no discharge, but once cleaned(similar to a sheath) it went away.

    Is she getting any other type of manufactured food product? Treats?
    I would start with food products first and move your way down the line.

    "Take the time it takes, so that it takes less time."
    "Expect a lot, accept a little, reward often."
    Pat Parelli

    running_rider Original Poster running_rider
    Topics Started: 1Replies Posted: 3

    Check your feed because I have written to feed companies asking if they have an oat based feed or a feed without soy. I could only find whole oats and everything else has soy, soy hulls, soy meal and soy oil. It is the new bulking ingredient. It is difficult to find a pelleted feed without it.

    My mare is a maiden, 6 years old, never foaled.

    I wondered if anyone ever had a problem they resolved by eliminating soy in the diet?

    Topics Started: 0Replies Posted: 1

    I’m not an expert by any means, so take anything I say on this subject with a grain of salt.

    The majority of soy is genetically modified, which makes it a ridiculous allergy food. I wouldn’t be surprised if your mare was allergic to it. I’d think if you can find a good food that does not contain soy and wean her onto that, you could watch her to see if the symptoms disappear. If they continue then it wouldn’t have been the soy.

    I pretty much came in here because the title intrigued me, as I am deathly allergic to even non-GMO soy (which makes it really hard to eat, because practically everything on the market contains soy now).

    Equine color genetics enthusiast!

    running_rider Original Poster running_rider
    Topics Started: 1Replies Posted: 3

    Thanks for your input. The stable owner found a feed that she said had no soy ($35 a bag!) but she said it is just about impossible to find anything without soy now. She is accurate in that account because I wrote to feed companies who confirmed it and said the best bet was to find a textured feed without soy or go to whole oats with a ration balancer. Lo and behold, the ration balancers consist mostly of…you guessed it…SOY. My mare’s neck also will break out in hives that come and go. It could also be a reaction to the feed. It will be interesting to see if she clears up with her change of menu. I was wondering if anyone else has had a mare with a similar problem?

    Topics Started: 0Replies Posted: 4

    It might cause/contribute to swelling. My new mare had a swollen teat (just one). No heat, no pain, no fever, no discharge(she was seen by a vet). I removed flaxseed and the small amount of alfalfa she was getting from her diet. Both contain phytoestrogens. Clover apparently does as well. Interestingly enough, flax oil (processed) does NOT contain them, it’s in the seed hull apparently. Her swelling decreased in about a week. Her heats also bothered her less. I do agree with previous posts that allergies could also be contributing since she gets hives. Since the vet has already looked her over and treated her, there’s no harm in trying to eliminate other possibilities. Good luck.

    Topics Started: 0Replies Posted: 15

    I find it amazing that there is Soy in horse feed. My horses are stabled where the fields are planted in soy. an occasional soy plant will grow in their paddock and they will not touch it. obviously they don’t want to eat soy but it is true you can’t hardly find a feed without it

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