Contact Information

Angel of Mercy Animal Critical Care
8734 Grissom Road
San Antonio, TX 78251
Phone: 210-684-2105
Fax: 210-256-0088

Business Hours:
All Night, Seven Days
Open Monday–Thursday, 6 p.m.–8 a.m.
Open 24 Hours on the Weekends
Friday 6 p.m.–Monday 8 a.m.
Open 24 Hours on Holidays


Our facility is fully equipped to provide quality emergency and critical care for our patients.  A complete in-house laboratory and radiology capability allows Angel of Mercy Animal Critical Care to institute appropriate medical and/or surgical treatment, while EKG monitoring and oxygen support are available to support critical patients.

Angel of Mercy Animal Critical Care will provide copies of the medical and/or surgical record to both you and your veterinarian, ensuring his/her optimum follow-up care of your pet after discharge from the emergency clinic.  A complete and final diagnosis is often not possible with just one office visit.  We therefore strongly recommend you schedule a recheck examination with your regular veterinarian the first working day following your visit to the emergency clinic.

cardiovascular, respiratory, metabolic pet emergencies

Angel of Mercy Animal Critical Care is equipped to stabilize and maintain pets with cardiovascular, respiratory, metabolic and endocrine, urinary, traumatic, reproductive or gastrointestinal emergencies.

  • Complete In-House Laboratory 
  • Radiology Capability 
  • Transfusion Medicine

Pets will be seen based on an emergency triage system.

Level One – Resuscitation
Level Two – Emergent Care
Level Three – Urgent Care
Level Four – Nonurgent Care
Level Five – Convenient Care

The doctor will examine patients according to the above triage system, which will be determined by our staff – level one being priority.

Level One – Resuscitation (CALL OVERHEAD FOR TECH)

The level-one or resuscitation category includes pets that arrive comatose or in respiratory and/or cardiac arrest. Immediate stabilization efforts are required.  The owner must sign an emergency consent form.

Level Two – Emergent Care (CALL OVERHEAD FOR TECH)

Pets may have cardiovascular compromise, be in respiratory distress, have hypoglycemia or be in a postictal (just came out of a seizure) state or seizuring.  Most patients with trauma, toxicosis or gastric dilatation-volvulus (bloat-distended abdomen) also fall into this category.  The owner must sign an emergency consent form.

Level Three – Urgent Care

Level-three or urgent care status indicates that the pet is in obvious mild discomfort and shows clinical signs that concern the owner.  The patient’s temperature, pulse and respiration (TPR) rates or pain-scale assessment (PSA) may or may not be within normal limits, but any abnormalities are not life threatening.  Patients with small open wounds, inflammation of the skin of the ear, lameness, injury to a foot or footpad and mild gastrointestinal disorders fall into this category.  It is very important to identify the reason for the injury when obtaining a history, because this will help determine the acuity (clear) level assignment.  Any abnormalities related to trauma may quickly warrant reclassifying the patient at a higher level. 

Level Four – Nonurgent Care

This is not life threatening, but the owner is anxious about a slight change in the pet’s behavior or appetite or clinical signs related to a chronic condition.  There are obvious signs of stress or discomfort, but the pet appears normal during the initial assessment.  Pets in this category may have internal or external parasites, dermatitis or food allergies.

Level Five – Convenient Care

This is at an owner’s personal or work schedule.  These pets present no clinical signs.  The owner may be concerned with ectoparasites or intestinal parasites, a small tumor, a chronic condition or mild dermatitis.  Euthanasia can fall in this category.  If the clinic is busy and the pet’s health will not be compromised, the owner can be referred to a day practice on the first business day or have a long wait.

Hospital Payment Policy

You will be presented with an estimated total fee for the recommended treatment/diagnostic plan at the time of your pet’s physical examination. Should you have any questions at that time, please don’t hesitate to ask.  It is our policy to receive full payment at the time of treatment either by cash, personal check, MasterCard, Discover, Visa or American Express.  We also offer a monthly payment plan called CareCredit as an option.  Proper identification is required.  Billing will not be permitted.

Click here for the Client Information Sheet

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Angel of Mercy Animal Critical Care
8734 Grissom Road, San Antonio, TX 78251

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1) Do you offer any discounts?
Yes, we offer Military Discounts with an ID.

2) How much are exams for my animal?
Our basic exam fee is $60.

3) Do you offer payment plans / options?
We accept all major credit cards, cash, checks and CareCredit. Payment is due at time of services, with proper ID. 

4) What is CareCredit?
CareCredit is a specialized credit card that may be used for medical services – included are veterinary services, and medical and dental services. You can apply by phone at 800-365-8295 or online at
5) What types of pets are treated at Angel of Mercy Animal Critical Care?
We primarily treat dogs and cats. However, we do have relief veterinarians who may treat exotic pets (example: rodents, ferrets, birds, reptiles, etc.). Please call before bringing in your exotic pet to ensure that the veterinarian on staff will see him / her.
6) What should do if you pick up a stray animal?
You may call Animal Care Services at 311 or 210-737-1442. Picking up a stray animal entails accepting financial responsibility, as well as ownership of the animal. Unfortunately, our facility limitations do not allow us to accept stray animals.
7) Does Angel of Mercy Animal Critical Care offer vaccines and other routine veterinary care?
Being an emergency veterinary hospital, we do not offer vaccines and routine veterinary care. Please contact a regular daytime veterinary hospital for these types of services.

Helpful Links

National Animal Poison Control

Pet Poison Helpline

San Antonio Humane Society

Spay-Neuter Assistance Program, Inc.

Animal Care Services
210-207-4738  or 311

Spay Sa

Animal Defense League

Wildlife Rescue