Any of you know much about horses? Had a mare about 18 laying out in the pasture about sunset last night. No Marks on here and she could not get up. After about 15 minutes she was able to get up but it looked like her back legs were paralyzed or did not work right for a while? I though she had a broke leg because one was twisted up under her. After she eventually made it up I lead her to some good grass and she started eating like nothing was wrong but then her muscles started spasming. It was weird - all along her back and shoulders and sides the muscles under her skin were flexing or jumping. After about 10 more minutes she was shaking all over and her left eye was rolling back in her head. I thought she was going to fall over but she eventually got interested in the grass again and it wore off. Do horses have seizures? Seemed okay this morning. She did this 3 weeks ago too.

Definitely a imbalance of some sort..i had a old gelding (18 yrs old) that started to cramp all over his body, looked like tennis balls under his skin..blood work showed his liver wasn't working correctly.. vet said it was most likely damage from ingesting a poison or insecticide sometime in his life. Six weeks off work and stall rest, large doses of vitamin E and i think vistorol brought him through it..went back to work and lived another 10 years

Hmm, I’m no help but I’m interested to hear a diagnoses. Knee jerk thought is noxious weed of some type. Been on this pasture for a while? Good luck

It might be ear ticks deep down in her ear or ears.
Mix some 10% permethrin with mineral oil and put it in each ear with a syringe.

That being said, it could be a number of things at her age. I have seen old horses and dogs that were treated for diabetes with no signs until they were in later years.

Look up HYPP

Rod- The first episode she had was also with large knots all over her. The vet gave her benadryl and a steriod and she snapped out of it after about 20 minutes. He thought she had an allergic reaction to a plant she at in the pasture.

Good deal on having hands on help, LB. I thought of a reactive response to something ingested , but theres also other reasons too, and hands on help is the only way to figuring it out.

I hope the plant can be identified , take her out of that pasture till she recovers and the field can be searched to ID the plant.

Search the pasture for common ground cherry, it is a problem this time of year 60 miles down stream from you.

Redbone- that sounds familiar too. Stupid Horses!

If I had to guess a neurologic disorder of some causing issue. Cancer, brain tumor and or a disease that caused a bacteria and infection. If you do find out please update your thread. I would like to know what the cause it. Thanks

Blood test tomorrow. No papers so we don't know if she is in Impressive line. No problems today. Thsnks

Epm?

Alfalfa hay will do that to some horses

Larry make sure there is no black walnut trees it can get at. The leaves are toxic to Horses. My labs were chewing and playing with BW branches and the next morning all three were paralyzed in the back end. Called the vet and he said to give plenty of fluids and let it take its course. By evening they were a lot better. It is toxic to horses.