Howard Wellens, VMD

Dr. Wellens is medical director of Queen Village Animal Hospital. He graduated from the University of Pennsylvania School of Veterinary Medicine in 1978. In 1980, he opened Queen Village Animal Hospital at 417 Bainbridge Street in Philadelphia. In 1988, he broke ground and built a state of the art building which became the new home of Queen Village Animal Hospital at 323 Bainbridge Street.

A born and bred Philadelphian, Dr. Wellens has been practicing in Queen Village for over 30 years. He has done everything from internal medicine to orthopedics. He has a no-nonsense practical approach to the art of medicine and uses his experience and keen skills to come up with the best result for the pet and the owner. He was the first veterinarian in the area to introduce the regular use of ultrasound exams and digital x-rays. Dr. Wellens has a particular passion for challenging medical cases. He enjoys introducing new veterinary technology to Queen Village Animal Hospital.

Dr. Wellens is President of the Burket-Plack Foundation. Burket-Plack is a Philadelphia-based non-profit foundation that donates money to animal welfare groups.

Barrie Yallof, DVM

Dr. Yallof has been as associate veterinarian at Queen Village Animal Hospital since 2004. In 2003, she earned a doctor of veterinary medicine degree from Cornell University’s College of Veterinary Medicine. Prior to that, she graduated cum laude from Amherst College with a BA in history and completed a post-baccalaureate program in pre-veterinary medicine at the University of Washington. She has a strong interest in the control of the stray cat population and particularly trap, neuter, release programs. With help from some of our staff technicians, Dr. Yallof has personally trapped strays, brought them to the hospital for medical care and neuter or spay, recovered them in her home, and released them where they were found. She has also volunteered at local shelters to spay and neuter recent adoptees.

Although Dr. Yallof loves caring for dogs, she has a place in her heart for geriatric cats. She approaches care with a philosophy of improving quality of life with minimal stress and invasiveness for this special population. The owner of two cats of her own, Dr. Yallof knows that all cats, but especially older ones, deserve the same respect and love from their clinician as they receive from their family.

She welcomes the opportunity to get to know you and to strategize a plan for keeping your cat happy and healthy.

Kim Greiner, VMD

Dr. Kim Greiner earned her VMD from the University of Pennsylvania School of Veterinary Medicine in 2006. Prior to that, Kim graduated Cum Laude with a BS in Animal Science from CornellUniversity. Before obtaining her veterinary degree, Dr. Greiner spent two years performing cancer research at the University of Pennsylvania’s Wistar Institute.

Dr. Greiner started off her career in central New Jersey practicing small animal general and emergency medicine. She and her husband, along with their spunky Siamese mix Ivy, relocated to Philadelphia where Dr. Greiner joined the team of Queen Village Animal Hospital in May 2009. Dr. Greiner’s special interests include small animal internal and preventative medicine, as well as emergency medicine.  In 2013 Dr. Greiner was certified by the USDA to prepare cats and dogs for international travel, completing country specific requirements and health certificates for animals traveling worldwide.

Kim volunteers as a guest speaker at the NJ Girls’ Career Institute, a program whose goal is to introduce and encourage young women to explore various professional career opportunities.

Since her move to Queen Village, Dr. Greiner has enjoyed living and practicing in such a pet-friendly community in which our pets are beloved members of the family. Her favorite aspect of general practice is the opportunity to develop close relationships with both pets and their owners and to provide the best possible care for an animal as its needs evolve over the course of its lifetime.


Callie Freeman, DVM

Dr. Callie Freeman was born and raised in the City of Angels (Los Angeles, California). She began her career with animals as a veterinary technician while attending college in Tallahassee, Florida. She received her Bachelors in Biology at Florida State University in 1996 and a Doctorate of Veterinary Medicine from the University of Florida in 2002.

Dr. Freeman began practicing at a large 24 hour practice in Miami, Florida. After a year, Dr. Freeman traveled to Philadelphia to complete a rotating small animal internship at the University of Pennsylvania. She then spent an additional year focusing on small animal surgery. Since then, Dr. Freeman has spent many years practicing emergency medicine at a top local referral hospital. Dr. Freeman has a special interest in emergency medicine and soft tissue surgery. She is also USDA accredited to perform domestic and international health certificates for travel.

Dr. Freeman lives in the area with her husband Mick, their 2 dogs (Lulu, a pitbull mix and Pixie, a French bulldog) and kitty (Minnie).

Daniel Goldner, VMD

A native of Philadelphia, Dr. Goldner was born and raised in the city. He attended nearby Germantown Friends School for high school before leaving the city to pursue his undergraduate degree in Vermont. After graduating from University of Pennsylvania’s School of Veterinary Medicine in 2001, he accepted a position at a regional general, referral and emergency veterinary hospital before joining the staff here at Queen Village Animal Hospital. His professional interests include internal medicine, dermatology, preventative health and diagnostic ultrasound. He currently lives in center city with his son Addison and pet dog Oscar. In his spare time, he enjoys sampling the city’s great restaurants and music venues, tennis, skiing and of course, hanging out with his family.

Alexander A. Collada, DVM

Dr. Collada is a veterinarian in a large part because his parents kept a promise. When he was 13 years old, he kept repeatedly asking his parents for a horse. ” My parents said I could have a horse if I came up with $800.” After working for a year and a half saving every penny I had, they were greatly surprised and unhappy that they have to keep their parental promise.” Fortunately, it worked out and it was the first step to a long life career and profession with animals. It was also a source of great joy and laughter as my parents watched me try to learn and ride the rambunctious mare.”

Dr. Collada graduated from Emory University in 1995 with a B.S. in Biology and an Ecology co-major with a minor in Dance and Choreography. After his undergraduate education, he did not quickly go into the veterinary field. In fact, Dr. Collada entered the Harvard Dance Program on a full scholarship and was dancing professionally in Boston and Atlanta. He also worked as an endoscopic technician and supervisor for a surgical supply company in the University of Pennsylvania Hospital system.

However, Dr. Collada had to pursue his true passion and received his doctorate of Veterinary Medicine in 2005 from St. George’s University and University of Georgia. He was on the dean’s list and was also elected class representative. With his broad love for animals, he also attended University of Tennessee’s Veterinary School Zoo Medicine program which he applied to the wildlife in Virginia area for 6 years.

Dr. Collada practiced small animal medicine and surgery in Northern Virginia at Columbia Pike Animal Hospital and Fairfax Animal Hospital for 6 years, as well as, in South Jersey at Pitman Animal Hospital for another 6 years. He is a member of the American Veterinary Medical Association. Dr. Collada is also fluent in Spanish and he hopes to use all of these skills and provide the best medicine and surgery possible while at Queen Village Animal Hospital.


We have a doctor and a highly skilled technician on call until 9 PM, seven days a week. If you leave a message on our answering machine, you will receive a call within one hour during the week, and two hours on the weekends. If your pet is experiencing a medical problem that cannot wait, or if it is after 9 PM, we recommend The University of Pennsylvania at 215-898-4680

Location Hours
Monday8:00am – 6:00pm
Tuesday9:00am – 7:00pm
Wednesday9:00am – 6:00pm
Thursday8:00am – 7:00pm
Friday9:00am – 6:00pm
Saturday9:00am – 2:00pm
Sunday10:00am – 2:00pm