Hours of Operation:

Mon/Tues/Thurs: 8:30am-6:00pm
Wednesday: 8:00am-7:30pm
Friday and first two Saturdays: 8:00am-12:00pm
Closed Sunday and last two Saturdays of the month

Call now 410-437-7514

Get Directions!

4499 Mountain Road
Pasadena, MD 21122
Fax: 410-360-4385

Happy Tails Veterinary Hospital

Full-service general practice serving the Pasadena community.

Dedicated to the health of small animals—meaning cats, dogs, and exotics—we provide an array of comprehensive care for elective and sick visits, offering preventative care, surgery, and dental, with in-house x-ray and lab capabilities.

In addition, our love of technology translates to better care of our patients: our state-of-the-art facilities provide a clean, comfortable, and fully equipped environment in which to treat your beloved animal, with a high-tech and fashionable lobby outfitted with hospitality center, Wi-Fi, tablets, and a mini laptop to expedite signing in, making future appointments, and requesting service and receipts. All of these equate to less paperwork, increased efficiency, and more time to focus on the health of our furry friends.

We look forward to offering you and your pet the finest in veterinary care.

About Us

Our Practice

At Happy Tails Veterinary Hospital we understand the importance of providing exceptional veterinary care.

We treasure each patient and give each our complete attention and compassion, one by one. We hold ourselves to high standards of ethics, honesty, and the best, most humane medical practices. We are committed to becoming your trusted family veterinary team, and an unqualified asset to this community.

Like you, we want to see happy tails wagging! We are passionate about open communication with owners, and operate in a fashion of translucency with regards to the treatment of your pet. We pledge to listen, and also share, every step of the way. This includes doing examinations, blood work, and procedures in front of you, as we feel this elevates both your and your pet’s level of comfort and awareness. In those small situations where patients behave better away from their owners, we can accommodate those needs. This philosophy also applies to the cost of care, which we pride ourselves on conveying upfront and honestly!

A few notes about our practice:

We believe in the most humane care when working with animals, with the goal of making each experience a good one for all involved. We endeavor to treat each patient with respect and a high degree of attention, attempting pills with food versus forcing medicine down the mouth, as well as holding cats and dogs in the nicest manner imaginable, so that the word “restraint” is used as loosely as possible. When it comes to vaccinations, we also trust in gentle handling and an individualized approach, looking at the whole patient and health history to develop a plan for your pet. 

Our treatment of felines involves a high level of sensitivity, as we keep them in separate areas than our canine patients to circumvent undue stress, and follow the Feline Association’s guidelines for grouping cat patient appointments together to avoid traumatic situations with other animals.

We invest in equipment, in time, and in training to provide a network of support and the information you need to follow through on treatment with comfort and conviction. We want you to return and to spread the good word. So we work hard to make your Happy Tails’ experience THE BEST—for you and your pet.



The first stop for all your pet’s health needs, Happy Tails caters to both sick and well visits. We have the capabilities to manage most health needs in-house, and should a specialist be necessary, we can assist and make recommendations in the process.

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Medical and dental services for each stage—whether baby, adult, or senior—include:

Cat and Dog

  • Health Certificate Examinations
  • Preventive Care
  • Vaccinations
  • Full Dental Suite
  • Digital Dental Radiography
  • Comprehensive Sick Care
  • Ultrasonography (Digital Imaging)
  • Digital Radiography
  • Laser Therapy
  • Routine and Elective Surgery
  • In-House Laboratory
  • In-House Pharmacy
  • Exotic Mammals Husbandry
  • Exotic Mammals Preventive Care

Healthier pets, happier owners: We also offer affordable healthcare payment options through the TruePet Wellness Program in addition to preventative care packages that allow owners to spread out payments for different sets of recommended care in our office. If enrolled in one of our preventative care packages, please ask about discounts offered for other services.


We feel strongly about affordable Preventive Health Care!

Online Forms

We offer full-service preventive health care plans which allow you to take advantage of the best veterinary healthcare recommendations while budgeting payments over a twelve month period. Plans are tailored to fit the needs of the client and the individual pet. Wellness Plans are entirely optional. You will always receive the same wonderful preventive and sick healthcare whether or not you choose to enroll in a wellness plan.

Easy as 1, 2, 3:

  • Step 1: With the help of our doctor and staff select the appropriate plan for your pet.
  • Step 2: Review and sign all paperwork, including the wellness plan contract and automatic payment information.
  • Step 3: Make your first payment and begin receiving services and care on the same day.

As an added bonus, every Wellness Plan participant Pet will receive a 5-10% discount on all services and products, unlimited complimentary nail trims, and unlimited scheduled exam visits for just $20.00. Contact us today for more detailed information on Preventive Wellness Health Care Plans.

Our Staff

  • Vera Calpeno
    Owner - DVM

    Before her medical career, Dr. Vera (as she prefers to be called) served in the U.S. Navy, acted as an administrator, and was a Delta Air Lines flight attendant. After the devastating events of 9/11, Dr. Vera left the airline industry to rekindle her childhood dream of becoming a veterinarian, working as a Middle Eastern dance teacher to support her studies.

    Upon receiving her DVM degree from the University of Georgia in 2009, Dr. Vera began practicing in the Annapolis area, which brought her closer to family and friends. She worked as an associate veterinarian for four years at Greater South River Animal Hospital (formerly Reichart Animal Hospital) in Edgewater, and at Chesapeake Animal Clinic in Owings, Maryland.

    While planning to establish her own practice, Dr. Vera worked as a relief veterinarian for Anne Arundel, Calvert, and Howard County area clinics, and practiced emergency medicine at AVPES in Calvert County. Her search for a vibrant and client-convenient location led to the busy Pasadena crossroads, now the home of Happy Tails.

  • Allison Froderman
    Technician Assistant
    Allison joined our team in October 2017. She comes to us with years of experience training horses and breeding English Cream Golden Retrievers.  

    She begins college in the fall and has future plans to attend Medical School to become a doctor. In her free time, Allison enjoys giving riding lessons, hiking, and painting. We are so excited to have Allison on our team!

  • Hannah Young

    Hannah joined our team in June 2018. She joins us with a background of working with horses and works at a local farm in her free time. In addition to working with horses, Hannah enjoys swimming and spending time outside with her 3 dogs. Hannah has been a great addition to our hospital and has become an asset to our receptionist team.

  • Kristi Lavigna-Mohamed

    Kristi joined the Happy Tails team in August 2018.  As a previous veterinary practice manager, she brings over 15 years of experience to our hospital.  Kristi shows care and compassion for each patient & enjoys meeting each client & pet that comes through our doors.  In her spare time you will find her traveling, cruising and attending dirt-track races up in Pennsylvania where she grew up.  Kristi shares her home with 2 furry felines, Autum & Mia, and her husband, Mike.

  • Kimberly Abusakran
    Veterinary Technician

    Kim's passion has been in the medical field for nearly twenty years. Her work experience has included clinical, specialty medicine, as well as eight years in research, where she's proud to have been published in several studies. She loves her petsitting business, hiking, interior design, and theater. However, her dream is to one day be on location with the big cats, elephants, and monkeys, protecting and rehabilitating our wildlife. For now, she's working on her degree in Animal Science as she continues to rescue, fix, and grow the smaller creatures here. She has two adult children, and four fur babies that she loves very much. 

  • Adriana Gilberto

    Adriana joined our team in September 2016. She graduated from University of Maryland, College Park with a Bachelors of Science degree. Passionate about working with horses, the segue to a small animal veterinary hospital was a natural fit. She loves getting to know all our the clients and greeting their wonderful a pets with tasty treats when they walk in the door. In her free time, Adriana loves to cook and restore vintage furniture. 

  • Austin Chaney
    Technician Assistant
    Austin is a part-time student who is interested in going into veterinarian studies. Austin joined our team in February 2018. In Austin’s free time, he breeds reptiles and creates vivariums to house all of his reptiles.  He also enjoys playing Bass at shows with his band Caraway in Baltimore.