Escaped and ate sugar cane
 

My 2 horses escaped their huge pasture and got in to a lot of sugar cane and grass around it. Last time when I gave one of them sugar cane chopped in cubes, he got stomach ache and a light bloat I assume since I saw marks of wallowing on his sides. I never fed it again and now they accidentally ate some. Is there anything I can do to prevent bloat? It's been couple of hours since the incident and hey both look calm and are eating grass in the pasture now, no signs of bloat or distress.

this is a medical emergency, you need to call a vet right now

They will be at high risk for not only bloat or colic, but laminitis. You wont see signs right now, but in hours to days, by which time it may be too late to help. Call a vet now.
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your horse needs medical treatment NOW, sugar overdose like that can be fatal, or cause founder, IE its hoof falls apart and the coffin bone pokes through the sole of the hoof resulting in a dead horse, This is not a wait and see thing. By the time you see anythign its too late, Ice and cold water rap its lower legs while you wait for the vet which should already be on the way

You need too call the vet asap signs of founer won't show for 12 to 18 hours.
Once founder signs show damage is done better to prevent it now while you can.
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Oh holy cow! I hope you called the vet. Please keep us posted.

Ditto all the above posters for every reason they've stated:-(

Did they eat the cane or just the leaves? It might matter what stage the cane ws at regarding sugar content.

Did you call the vet yet? I hope all is well.