Can Horses Eat Hay That Has Been Rained On?

Horses are herbivores, and hay is a staple in their diet. It supplies them with essential fiber, which aids in digestion and keeps their gastrointestinal system healthy. However, when hay gets rained on, certain concerns arise regarding its quality and suitability for equine consumption.

Factors to Consider

A. Effect of Rain on Hay Quality

Rain can significantly affect the quality of hay. It may cause the hay to lose some of its nutritional value, making it less beneficial for horses.

B. Mold and Mildew Risks

Exposure to moisture can lead to mold and mildew growth on hay, which can be harmful to horses when ingested.

C. Nutritional Changes in Wet Hay

Wet hay may undergo nutritional changes, such as leaching out water-soluble vitamins and minerals, impacting its overall nutritional content.

Inspecting Rained-On Hay

A. Visual Inspection for Mold and Damage

Check the hay visually for any signs of mold, discoloration, or physical damage.

B. Smelling the Hay for Signs of Spoilage

Sniff the hay to detect any musty or sour odor, which could indicate mold or spoilage.

C. Feeling the Texture and Moisture Level

Feel the hay to gauge its moisture level. Excessively wet hay may indicate a higher risk of mold growth.

Feeding Rained-On Hay

A. Drying Out Wet Hay Properly

If the hay is only slightly damp, spreading it out in the sun to dry can help salvage some of its nutritional value.

B. Mixing with Dry Hay to Reduce Risks

To minimize the impact of wet hay, consider mixing it with dry hay to dilute any potential mold or mildew.

C. Using Rained-On Hay in Moderation

Feed rained-on hay in moderation to decrease the risk of adverse effects on your horse’s health.

Health Risks and Precautions

A. Potential Health Issues for Horses

Feeding moldy or spoiled hay can lead to health problems, such as respiratory issues or digestive upsets.

B. Watch for Signs of Digestive Problems

Monitor your horse closely for any signs of colic, diarrhea, or changes in behavior after consuming wet hay.

C. Consulting a Veterinarian for Guidance

If you have concerns about feeding rained-on hay, seek advice from your veterinarian to ensure your horse’s well-being.

Alternative Forage Options

A. Considering Other Forage Sources

Explore alternative forage options, such as fresh pasture or haylage, to provide a balanced diet for your horse.

B. Pelleted and Cubed Hay Alternatives

Pelleted or cubed hay can be viable alternatives to rained-on hay, as they are less likely to have mold or spoilage issues.

C. Pasture and Grazing Options

Allowing your horse access to quality pasture and grazing areas can complement their hay intake and add variety to their diet.

Is it OK to feed horses wet hay?

Feeding horses wet hay can be risky and is generally not recommended. Wet hay can lead to mold growth and a decline in nutritional value, posing health risks to horses.

Does hay go bad if it gets wet?

Yes, hay can go bad if it gets wet. Exposure to moisture can create favorable conditions for mold and mildew to develop on the hay, making it unsuitable for equine consumption.

What happens if horse hay gets wet?

If horse hay gets wet, it can undergo nutritional changes and become less palatable. It may also develop mold, which can cause respiratory issues and digestive problems in horses.

What to do with hay after rain?

After rain, it is essential to inspect the hay carefully for any signs of mold or spoilage. If the hay is only slightly damp, spreading it out in the sun to dry can help salvage some of its nutritional value. However, if the hay is extensively wet or moldy, it is best to consider alternative forage options to ensure the horse’s health and well-being.


Feeding rained-on hay to horses requires careful consideration of its quality and potential risks. Always prioritize your horse’s health and well-being when making dietary decisions. If in doubt, consult with a veterinarian for expert guidance on the best feeding practices for your equine companion. With proper care and attention, you can ensure your horse receives a nutritionally balanced diet for optimal health and performance.