Animal ER of Northwest Houston 27104 Hwy 290 West, Suite 107, Cypress Texas 77429 map >  |  281-304-0039
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WonderPet Rehab and Recovery Animal ER of Northwest Houston is a privately owned emergency and critical care veterinary hospital serving families in Cypress, Katy, and Waller as well as the local surrounding communities of Fairfield, Black Horse Ranch, and Bridgeland. Located directly on the access road of Highway 290 (Hempstead Rd) at Mueschke Rd, the Animal ER offers a convenient location that allows for seamless transport of your pet with minimal interruption or detours that may add additional stress to the situation. Animal ER wants owners to rest assured that no pet health problem is too small or too minor for an emergency room evaluation. Our experienced staff will collaborate to provide a concise care plan for your pet that addresses any of the concerns you face with your furry friend. Our hospital is devoted to providing the entire family and will dedicate the appropriate attention and time to explaining recommendations and planning, providing quality care to pets and giving owners peace of mind. 

Animal ER is staffed with professionals whose mission is not only to provide excellent medical services, but to create a customized critical care plan for each pet. We regard each patient as a prestigious member of your family as you trust us to care for them. We are committed to caring for hearts at both ends of the leash throughout minor and major injuries with care that exceeds the current standard of emergency veterinary medicine. Recognizing that handing over “leash” for a night of recovery is difficulty and our team will responsibly and honorably “hold that leash” with the utmost regard throughout your pet’s treatment. Our trained doctors and staff are dedicating to providing families with superior customer service as we strive to comfort families in their time of distress with their pets.  

Providing state of the art diagnostics, Animal ER of Northwest Houston is equipped to provide the necessary care for support and stabilization of injured dogs and cats. We are open nights, weekends and holidays to provide your pet with medical care during times that your veterinarian may be unavailable.  We recognize the obligations extend to providing care that helps both you and your family feel at home until your family veterinarian can resume care for your pet. Our caring staff remain on site and by your pet’s side from the point of admission for the duration of their care.

Animal ER will work with both you and your veterinarian to provide care that is intended for the purposes of diagnosis and support. Our goal is to provide flexibility within recommendations by discussing care options recognizing the reality of financial obstacles influence care decisions for many families.  We will care for your pet as one of our own under any situation, keeping those beloved pets’ needs as our first priority.


Teddy Bear Care Day

A community event hosted monthly for free kid-friendly fun and free stuffed animal checkups. Bring your favorite old or new stuffed animal for a FREE health check up by a real veterinarian. Learn and play veterinarian for a day!

Please visit the Animal ER of Northwest Houston Facebook page for more information.




Dr.Jennifer Hennessey Bremseth, CVJ 

Owner of the Animal ER of Northwest Houston, Dr Jennifer Hennessey Bremseth has over 17 years of experience in emergency and critical care. Dr. Hennessey Bremseth's vision of an emergency practice designed and devoted to the customized care of both families and their pets lead her to develop the Animal ER in 2014.

A 2005 graduate of Texas A&M College of Veterinary Medicine, Dr Hennessey Bremseth carries additional training as a Certified Veterinary Journalist with the American Society of Veterinary Journalists. Dr Hennessey Bremseth is published in numerous magazines and journals, has a column in the Texas Veterinarian magazine, as well as is a frequent guest for Houston’s Fox 26, KPRC 2 News and on Great Day Houston. Professional interests include prevention of emergency illness, utilization of lipid emulsion for toxin exposure, and management of trauma patients.  Dr Hennessey Bremseth serves on the TVMA Public Relations Committee as well as holds memberships with the Veterinary Emergency & Critical Care Society, the Harris County Veterinary Medical Association, the Texas Veterinary Medical Association, Veterinary News Network, the American Veterinary Medical Association, the American Association of Rehabilitation Veterinarians (AARV) , the International Association of Veterinary Rehabilitation and Physical Therapy (IAVRPT) and the International Veterinarian Academy of Pain Management (IVAPM). Off site, Dr Hennessey Bremseth is actively involved with the Texas A&M College of Veterinary Medicine helping support their local emergency medicine society and works with vet students onsite at the ER as a mentor. Dr Hennessey Bremseth most recently enjoyed time as the Program Director at Pima Medical Institute and helped launch their new Veterinary Technician program. In 2015, Dr Hennessey Bremseth will be working as a lead veterinary advisor for a new project evaluating the nutritional care for dogs with cancer at the KetoPet Sanctuary.

Outside of the ER, Dr Hennessey Bremseth is a mother of two amazing kiddos and proud wife of Army Sergeant Major Greg Bremseth. Committed to her own health and well-being, Dr Hennessey Bremseth is a nationally qualified NPC Figure and Bikini competitor earning many fitness awards including a NPC 2015 Overall Champion in Masters Bikini in California and the 2012 Texas State Natural Figure Champion. Dr Hennessey Bremseth is a sponsored athlete with Team Formulation 1 Nutrition.

In a mission to stay connected with the local communities of NW Houston, Dr Hennessey Bremseth recently served as an officer on the board for the Greater Houston Quarter Horse Association and now enjoys community work at area Cy-Fair schools talking to students about pet care and veterinary medicine.


Roger L. Zinn, CVPM
ER Administrator

Growing up in Cypress, Texas, Roger has always had an immense interest in animals and the veterinary industry. For over 10 years, he’s been acquiring extensive experience in patient and client care, hospital administration, management, education, and public speaking. Currently, Roger shares his abilities and talents by overseeing the operations of Animal ER of Northwest Houston and a general practice in central Houston. Roger is also an adjunct educator for a Veterinary Assistant program for the Houston Community College System and lectures for different pharmaceutical companies on various veterinary topics.

Roger attended Sul Ross State University and is currently attending Colorado State University’s College of Business - Veterinary Management Institute. Roger received his Certified Veterinary Practice Manager (CVPM) designation this year which in the veterinary industry is recognized as the sign of achievement in excellence. As a professional veterinary practice manager, Roger has met and attained compliance with the professional competency standards identified and adopted by the Veterinary Hospital Managers Association.

Roger enjoys music, art, and the theatre, but mostly spends his time away from the hospital with his boxer, Haley, and cat, Chip.

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