Gastric Ulcers and Weanlings: Effects of Diet Type

Gastric ulcers can affect horses of all breeds, ages, shapes, and sizes, including weanlings.
Please login

No account yet? Register


Gastric ulcers can affect horses of all breeds, ages, shapes, and sizes. Weanlings are among these: They are transitioning from a diet of milk to one of forages and concentrates, while also experiencing the stress of separation from their dams. So, what type of feed should an owner provide to ease the transition’s impact on a weanling’s GI tract? A team from the University of Illinois led by Kevin Kline, PhD, professor of animal science, recently completed a study in which they determined that a forage-rich diet caused the least amount of gastrointestinal (GI) problems.

Kline and colleagues evaluated the effects of three different diets (an all-alfalfa hay diet, a diet of hay cubes and grain, and one consisting of a pelleted complete feed) on the GI health of 16 Standardbred weanlings (six colts and 10 fillies). The weanlings were divided into two groups of eight (three colts and five fillies each).

Researchers fed each group of horses a different diet during three 28-day periods. Both groups of weanlings were fed the all-alfalfa hay diet for the first 28-day period. Then, researchers fed one group the hay cubes and grain diet and gave the other complete feed for 28 days. The groups switched diets for the final 28 days.

At the end of each 28-day period, each weanling underwent an endoscopic examination to determine the number and severity of gastric ulcers present in the stomach. The veterinarian performing the endoscopic exams was blinded to the weanlings’ most recent diets, except for the first round of exams in which all the horses were on the same diet

Create a free account with to view this content. is home to thousands of free articles about horse health care. In order to access some of our exclusive free content, you must be signed into

Start your free account today!

Already have an account?
and continue reading.


Written by:

Erica Larson, former news editor for The Horse, holds a degree in journalism with an external specialty in equine science from Michigan State University in East Lansing. A Massachusetts native, she grew up in the saddle and has dabbled in a variety of disciplines including foxhunting, saddle seat, and mounted games. Currently, Erica competes in eventing with her OTTB, Dorado.

Related Articles

Stay on top of the most recent Horse Health news with

FREE weekly newsletters from

Sponsored Content

Weekly Poll

sponsored by:

What signs does your horse show when he has gastric ulcers? Please check all that apply.
88 votes · 217 answers

Readers’ Most Popular

Sign In

Don’t have an account? Register for a FREE account here.

Need to update your account?

You need to be logged in to fill out this form

Create a free account with!