Contact Us

Have a question or issue that needs our attention?

To report an adverse reaction, product-related problem or human exposure:

Companion Animal Technical Services 
Dogs & Cats 
800-224-5318

Livestock Technical Services 
Cattle, Swine, Poultry, and Aquaculture 
800-211-3573 

Equine Technical Services 
866-349-3497

Information about Merck Animal Health products:

Merck Animal Health Customer Service 
800-521-5767 
8am-5pm CST Mon-Fri

Microchip identification in dogs and cats, call HomeAgain: 
800-341-5785 
8am-5pm CST Mon-Fri

For more information on any of the subjects on the Merck Animal Health website, please fill in the form below.

To report an adverse reaction, product-related problem or human exposure:

Companion Animal Technical Services 
Dogs & Cats 
800-224-5318

Livestock Technical Services 
Cattle, Swine, Poultry, and Aquaculture 
800-211-3573 

Equine Technical Services 
866-349-3497

Information about Merck Animal Health products:

Merck Animal Health Customer Service 
800-521-5767 
8am-5pm CST Mon-Fri

Microchip identification in dogs and cats, call HomeAgain: 
800-341-5785 
8am-5pm CST Mon-Fri

For more information on any of the subjects on the Merck Animal Health website, please fill in the form below.

For after-hours emergencies: Call the appropriate number listed above and follow the prompts.

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