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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

  • We were very concerned about our 17-year-old chihuahua. They got us right in to see a doctor. They listened to our concerns and addressed what they could which was very comforting. Overall, polite, professional and practical. Thank you!
    - Bryan

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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.

Diarrhea in Dogs

Diarrhea in Dogs

It can be concerning if your dog has diarrhea and you don't know the reason why, especially if it won't stop. Our Crystal Lake vets explain some possible causes of diarrhea in dogs and what you can do to help.

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My Cat Won't Drink Water! What Should I do?

My Cat Won't Drink Water! What Should I do?

Hydration is important to your cat's skin, coat, and organ health. It is reasonably concerning to an owner when their kitty suddenly stops drinking water. In this post, our Crystal Lake veterinarians list some reasons why your cat may not be drinking water and what to do.

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Why Is My Cat Breathing Heavily?

Why Is My Cat Breathing Heavily?

We often associate heavy breathing with dogs, as panting is how they cool down. In cats, however, this behavior is not very common. Our Crystal Lake vets share some reasons why your cat could be breathing heavily and when you should be concerned.

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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