October 2024

Why Do Horses Chew On Things?

Chewing on objects is typically self-medication for the horse. Chewing, or self-medicating, is most likely due to discomfort – stemming from physical and/or mental stress from lack of forage.

Chewing activates saliva production, which buffers gastric acid. The stomach produces acid 24/7 to prepare for constant uptake of food. The stomach begins to empty in 20 minutes to 2 hours or when  2/3’s  full – depending on the type of feed and rate of consumption. Once feed stuff travels to the small intestine, the stomach ​continues to produce acid with or without food present. Chewing effectively buffers gastric acid – and can give some relief even without food.

A horse chewing on a halter

Prior to providing my horses with free-choice forage, any object within reach was subject to mastication and destruction including lead ropes, halters, fly masks etc. Thankfully,  post-free choice forage, objects remained intact!

Remember – Horses are innately oral. They are mentally and physically designed to chew 16-20 hours a day. (Learn more about How Forage Buffers Acid and Safer Always Have Hay Sources.)

Young horses may require a firm surface to assist in exfoliation of baby teeth such as a log.

Common Causes of Discomfort, Stress & Vices

Common causes of physical – and/or mental – discomfort, stress, and vices include:

  • Lack of forage
  • Ulcers
  • Weak digestive tract due to parasite load or low gut flora population
  • Boredom
  • Confinement
  • Isolation
  • Mineral/Vitamin deficiencies or imbalances
  • Pain

Providing free choice forage, a mentally and physically healthy environment, resolving any source of pain and a well-balanced diet should keep your herd entertained and preserve your objects for their intended purpose.


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