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  • Here For You Around The Clock

    24/7 Emergency Care in Crystal Lake

    At Companion Animal Specialty and Emergency Hospital, we have veterinarians specially trained to provide compassionate and dedicated emergency medical care and triage, 24 hours, 7 days a week.

    Emergency Services

  • Advanced Veterinary Care in Crystal Lake

    Meeting Your Pet's Specialty Healthcare Needs

    Our team at CASE Hospital is here to meet your pet's needs. Our board-certified specialists and highly-trained veterinarians offer a range of specialized care.

    Specialty Services

Diagnostics & Lab

Our in-house veterinary lab allows us to complete advanced diagnostic testing accurately and efficiently so your pet's care can begin as soon as possible. 

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ER Services

We're here for you around the clock. You can count on CASE Hospital to be ready 24/7/365 to manage your pet's emergency needs.  

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Veterinary Care You Can Count On

Welcome to Companion Animal Specialty and Emergency Hospital in Crystal Lake

We are a specialty and emergency hospital offering comprehensive specialist and critical care services to cats and dogs in Crystal Lake and the surrounding areas.

We offer a range of specialty services including internal medicine, and  integrative medicine to help pets suffering from complex conditions, injuries, or diseases.

We care for Crystal Lake’s companion animals and have developed a reputation over the years for quality, professional care with a compassionate touch.

Our team of experienced Crystal Lake vets are proud to live up to the standards of veterinary excellence laid out by the American Animal Hospital Association!


About Our Hospital

  • The staff was super friendly and nice and showed they cared about my dog. They took great care of my dog and reached out to my vet to let her know what happened. I would highly recommend this ER Vet since I've been to others before and was never taken care of and treated so well.
    - Sara

Stay Informed

Tips & Advice From Our Team

Whether you are looking for advice on emergency conditions or information on common pet illnesses, our informative blog features valuable tips and advice from our Crystal Lake vets that will help you to keep your pets healthy and happy.

Does my cat need a friend? Adopting a second cat.

Does my cat need a friend? Adopting a second cat.

Despite their reputation as independent creatures, cats are social animals who thrive on forming intimate bonds with other animals. Here, our Crystal Lake veterinarians talk about bringing a second cat into your home, as well as how to introduce them to each other.

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Pet Eating Problems: Why Won't My Dog Eat?

Pet Eating Problems: Why Won't My Dog Eat?

It can be concerning if your dog suddenly stops eating, especially if they usually have an enthusiastic appetite. In this post, our Crystal Lake vets discuss some reasons why your dog might not be eating and what you can do to help them get their appetite back.

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Common Cat Illnesses & Their Symptoms

Common Cat Illnesses & Their Symptoms

Cat's are incredibly good at hiding when they aren't feeling well. Here our Crystal Lake vets discuss some of the most common illnesses that a cat might experience, their symptoms and what to do if your cat experiences any of the following conditions. 

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Expert care in McHenry County

Address & Hours

Companion Animal Specialty and Emergency Hospital proudly serves patients in Crystal Lake and beyond.

24/7 Emergency Care

We see emergency and critical care cases 24 hours a day, 7 days a week, 365 days a year.

Specialty department hours vary week by week.

Contact Us


1095 Pingree Rd 120, Crystal Lake, IL 60014 US

Phone Number

(815) 479-9119

New Patients Welcome

Companion Animal Specialty and Emergency Hospital is accepting new patients! Our specialists and experienced emergency veterinarians are passionate about restoring good health to animal companions in Crystal Lake.

Contact Us

(815) 479-9119 Contact