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ZoaShield 25%

This page contains information on ZoaShield 25% for veterinary use.
The information provided typically includes the following:
  • ZoaShield 25% Indications
  • Warnings and cautions for ZoaShield 25%
  • Direction and dosage information for ZoaShield 25%

ZoaShield 25%

This treatment applies to the following species:
Company: Elanco US

(zoalene Type A medicated article)


Active Drug Ingredient

Zoalene (3,5-dinitro-o-toluamide)


Inactive Ingredients

Roughage product, calcium carbonate, mineral oil


For use in preparation of feeds for chickens and turkeys only. Livestock remedy.

ZoaShield 25% Indications

Broiler Chickens: For prevention and control of coccidiosis

Replacement Chickens: For development of active immunity to coccidiosis

Growing Turkeys: For prevention and control of coccidiosis


It is suggested that a mixture of ZoaShield 25% and some feed ingredient be prepared prior to mixing in with the finished ration. This will ensure thorough and even distribution in the feed.

For chickens grown for meat purposes:

Use 1 lb (454 g) of ZoaShield 25% per 2,000 lb (909 kg) of finished product to produce a feed containing 0.0125% zoalene. ZoaShield 25% should be thoroughly blended into the finished feed. Feed containing zoalene should be fed continuously as the only ration from the time chicks are placed in floor pens until they are slaughtered for meat.

For replacement chickens:

Feed containing zoalene can be used in a program to raise replacement birds. When used under conditions of exposure to coccidiosis, it will allow immunity to develop adequately to protect against losses due to the disease when the birds are placed on nonmedicated feed for egg laying purposes. The following chart outlines the type of feeding program to follow where complete formulated feed is the sole ration:


Starter ration

Grower ration*

Growing conditions

% Zoalene per ton

ZoaShield 25% to be added per ton of feed

% Zoalene in feed

ZoaShield 25% to be added per ton of feed





Severe exposure to coccidiosis expected




0.0083 to 0.0125

2/3 to 1

303 to 454

Light to moderate exposure to coccidiosis expected

0.0083 to 0.0125

2/3 to 1

303 to 454

0.004 to 0.0083

1/3 to 2/3

151 to 303

*Grower ration not to be fed to birds over 14 weeks of age.

For turkeys grown for meat purposes only:

When turkey poults are reared in confinement and severe exposure to coccidiosis is usually a problem, use 1 1/2 lb (681 g) of ZoaShield 25% per ton (2,000 lb) of feed to produce a finished feed containing 0.0187% zoalene. Under the usual conditions of rearing turkey poults, or when turkey poults are on range, use 1 lb (454 g) of ZoaShield 25% per 2,000 lb (909 kg) of feed to produce a finished feed containing 0.0125% zoalene. The feed containing zoalene should be fed continuously until the birds are 14 to 16 weeks of age.

Combinations With Other Drugs

Use only in accordance with the current New Animal Drug Regulation for zoalene, Section 558.680 of the Regulations promulgated under the Federal Food, Drug and Cosmetic Act.

ZoaShield 25% Cautions

Not to be fed to laying birds.

Consult a veterinarian or poultry pathologist if losses exceed 0.5% in a two-day period.

Avoid inhaling dust.

Avoid contact with eyes.

To report suspected adverse drug events, for technical assistance or to obtain a copy of the Safety Data Sheet, contact Elanco, 1-800-428-4441. For additional information about adverse drug experience reporting for animal drugs, contact FDA at 1-888-FDA-VETS or

Store at or below 25°C. Excursions permitted to 40°C.

Restricted Drug (California) - use only as directed. Not for human use.

Approved by FDA under ANADA # 200-690

ZoaShield, Elanco and the diagonal bar logo are trademarks of Elanco or its affiliates.

Manufactured for:

Elanco US Inc., Greenfield, IN 46140, USA

Net wt.


50 LB (22.68 kg)


CPN: 1131089.0

Customer Service:   317-276-1262
Technical Service:   800-428-4441
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Copyright © 2022 Animalytix LLC. Updated: 2022-11-29