Walnut Trees and Horses....? Some questions.

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Walnut Trees and Horses....? Some questions.

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  • Why can't horses pasture near black walnut trees?
  • Are walnut leaves poisonous to horses

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    11-02-2011, 06:59 PM
Exclamation Walnut Trees and Horses....? Some questions.

I have two different kinds of Walnut trees in the pasture that is being fenced right now and the horses are going to go out in. What kind of Walnut trees are toxic to horses? There are two black walnut trees and one english walnut tree in the pasture. Are both kinds toxic? Also, I live in Indiana so all the leaves have fallen off of them because it's fall so would the trees be toxic to the horses at this time of year? What part of the tree is toxic to the horses? Please help me if you can because I'm needing to turn my horses out in that pasture ASAP! Thanks!

Also is it just Red Oak trees that are poisnous or are other types of Oak trees poisnous too?
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    11-02-2011, 08:07 PM
Green Broke
Leave the trees alone and you'll be fine. The toxin in black walnut is in the sawdust and woodchips and irritates the feet. It isnt an ingestion threat from what I have found searching the web.
My area has red maples which are listed everywhere as having toxic leaves. Horses are smart though and will rarely if ever eat something toxic as long as they have hay and arnt cooped up in a small spot.
    11-03-2011, 03:19 AM
DONT put the horses in that field until you romove the the black walnut trees they're really poison to horses! My farrier just told me all about it. He had a client that had to put their horse down because it got really sick and they didnt know what was wrong with and they got an atopsy done it should that it was because it ate the walnuts off a black walnut tree. It causes uluers and other painful abraisons in there intestines and stomach. Im not to sure about the english walnut tree but I wouldnt take any chances I would remove them all and get any and all walnuts off the ground before you put in horses in that field.
    11-03-2011, 08:03 AM
If your horses pastures have black walnut trees you should not allow them to be on the pasture in the fall when they are on the ground, and after they finish dropping you should remove them all from the pasture before you allow the horses out there to graze.
This is one of the few plants that is not toxic when eaten. Instead, it is toxic when your horse's feet come in contact with it. The exact toxic compound in the tree is unknown.
It can cause laminitis.
    11-03-2011, 09:32 AM
So if I remove the black walnuts that have fallen to the ground (all the walnuts and leaves have fallen off the trees) then I won't have to worry about cutting it down untill next spring when it's getting the walnuts and leaves back?
Annnie31 likes this.
    11-03-2011, 09:41 AM
Yes it's standing on the walnuts that have fallen. All the horses I've seen founder from walnuts were in a pasture that only had a walnut tree for shade. Can't help you with the question about if both species are toxic though.
    11-03-2011, 01:17 PM
As a rule of thumb I was always taught that NUT trees and horses do not mix so I would remove all NUT trees from any pasture. Once you have cleaned up the leaves and nuts (after the trees have finished dropping them) it is safe to pasture there for the winter. Periodic checks for any nuts that you may have missed or have fallen after cleanup is a good idea.
shaggy likes this.
    11-04-2011, 04:15 AM
Annie31- black walnuts are poisoness when horses eat them did you not read the story my farrier told me they cause ulsers and blisters there insides! And yes my horse has foundered before that what brought it up in the first place and the farrier said to remove the trees if we had them in field anywhere the horses could get to them.

PoundHooves- I would remove them completely before putting horses in that field. It just not worth risk. Now is a good time to cut them anyway cause if you wait til spring they'll be blooming again which causes seeds which will cause new trees to grow.
    11-04-2011, 10:04 AM
Green Broke
If you do cut them make sure the sawdust and chips get picked up and dumped, not left in field or used as bedding. Standing on the sawdust is the worse part of the problem
Annnie31 likes this.
    11-04-2011, 10:12 AM
As others have said, its standing on the sawdust that is the biggest concern. In addition to the laminitis already brought up, walnut can cause pregnant mares to abort.
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