Dosage Guidelines

Horses with Active Ulcers or Symptoms
• Give 1 ml per 100 lbs of body weight orally, twice daily (AM and PM) for 14 days.
• After 14 days, reduce to 1 ml per 100 lbs once daily for another 14 days.
• Transition to a maintenance dose of 0.5 ml per 100 lbs daily.
• During periods of stress (e.g., riding, hauling, weather or environment changes), give 1 ml per 100 lbs prior to the event.

Older Horses / Hard Keepers
• Give 1 ml per 100 lbs orally for 10 days.
• Follow with 0.5 ml per 100 lbs daily until desired weight is achieved.
• Once at target weight, give 1 ml per 100 lbs 2–3 times per week for maintenance.

Ulcer-Prone Horses / Horses in Rigorous Training
• Follow the same protocol as outlined above for Horses with Active Ulcers or Symptoms.

Respiratory Infections / Shipping Fever
• Give 1 ml per 100 lbs daily until symptoms (e.g., cough, fever) subside.
• If antibiotics are prescribed, continue giving 1 ml per 100 lbs daily for at least 10 days after the last antibiotic dose.

Environmental Stress (Extreme Heat, Cold, or Disease Outbreak)
• Give 1 ml per 100 lbs orally prior to expected stress or environmental changes.

Colic Support
• At the onset of symptoms, give 30–50 ml orally.
• You may give up to 100 ml total.
• Contact your veterinarian if symptoms persist.

Hauling / Travel
• Give 1 ml per 100 lbs orally the day before departure and daily while away from home.

 

Ingredients

Colloidal Silver, water, corn oil, guar gum, orange peel bitters, onion extract, soybean oil, glycerin, vegetable-based fatty acids, natural apple flavoring

Looking for Zesterra® without the colloidal silver?

Give us a call at 1-800-254-0179 x 1!

Guaranteed Analysis

Guaranteed Analysis (per 100 mL):

Moisture (max): 90.0%

Crude Protein (min): 2.75%

Calcium (min): 0.10%

Calcium (max): 0.25%

Potassium (min): 0.70%

Sulfur (min): 0.30%

Sodium (min): 0.60%

Sodium (max): 0.90%

Copper (min): 0.20 ppm

Dosing Calculators

We offer two easy-to-use dosing calculators to help you determine the right amount for your horse—one for ulcer treatment and prevention, and one for everyday use.

Dosing Calculators

Zesterra®

Support your horse from the inside out with Zesterra® — a trusted, all-natural supplement designed to promote digestive health, hydration, and performance in horses of all ages.

Helps prevent and heal gastric ulcers naturally

Neutralizes excess gastric acid to support a healthy stomach

Encourages appetite and water intake during times of stress

Safe for foals, lactating mares, and performance horses alike

Includes two convenient dosing syringes

Description

Zesterra® is an all-natural oral liquid supplement designed to support horses during times of stress, such as hauling, heavy training, foaling and during times of extreme heat or cold.

 

Zesterra® is safe for all classes of horses including lactating mares and foals.

 

Zesterra® stimulates appetite and water consumption safely and naturally by balancing the pH of the stomach. It can be used as a flavor enhancer for horses that reject water from new sources when being hauled to new destinations.