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Practice Name

Trinity Animal Hospital

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Primary Location
31 Ponderosa Lane
Weaverville, CA 96093
Phone: 530-623-5757
Fax: 530-623-3411

Office Hours

DayWeavervilleSatellite Clinics
Tuesday8am-8pmHayfork 9a-5p
Thursday8am-8pmWillow Creek 9a-5p
SaturdayEmergency On Call
SundayEmergency On Call
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Thomas Nickerson, DVM

Dr. Nickerson received his BS from the University of Maryland and his DVM degree (with high honors) from the University of Georgia (Go Dawgs!).

Following graduation from UGA, he spent a year as a pathology resident at UC Davis. During this time, he discovered that he preferred working with more lively patients. He left the residency program to pursue a more rewarding career in private practice. 

From 1979 to 1981, Dr. Nickerson worked as an associate veterinarian in Sacramento. He moved to Willow Creek in 1981 and spent the next 9 years in practice there. In 1990, he purchased Trinity Animal Hospital in Weaverville.

Although the small building served him well for almost two decades, 2008 marked the opening of a long awaited modern facility on Ponderosa Lane. 

Dr. Nickerson shares his home with one good cat (Blackberry), one bad cat (Lilac), and The Kipper a fun loving border collie.

Mary Schlicting, DVM

Dr. Schlicting received her DVM degree from Ross University, and completed her clinical year at Oregon State University (Go Beavers!).

During veterinary school, she was involved with the feral cat 'trap and release' program, and served several semesters as the president of the student chapter of AAFP (American Association of Feline Practitioners). She also spent time assisting with sea turtle monitoring and nest preservation. In addition to her emphasis in feline medicine, Dr. Schlicting has a particular interest in llama, alpaca and goat medicine, as well as emergency and critical care. 

Dr. Schlicting was born and raised in Allentown, PA.  She moved to California  where she completed her BA at Mills College in Oakland. She moved to Trinity County to escape the city, and shares her home with 3 cats and 1 dog: Molly, Cido, Miette and Ophelia.

When away from the hospital, Dr. Schlicting spends time trail running (with Ophelia), drawing, sculpting and backpacking.


Lisa H.

Lisa joined the TAH team in 2010. You can find her smiling face greeting you when you walk in the door. Lisa has had many careers in her life but is discovering that veterinary science is one of her favorites. Her sense of humor and her charm always brighten our days.

  Cassandra W.

Cassandra is a welcoming addition to our team. Cassandra joined the TAH team in 2014. Her warm and friendly character is a great addition to our team.

Sara R.

Sara spends her time at the Willow Creek office. She is a friendly and familiar face to the community there.

Picture coming soon......

Technician Assistants

Emma Rademaker

Emma spends her time between our Weaverville and Hayfork offices. She worked with Dr. Martin at the Hayfork Veterinary Clinic for several years prior to his retirement and the sale of the clinic to Dr. Nickerson. Emma assists in kennel and reception. Emma is a wonderful addition to our team; smart, fun and caring, we're glad she's here! 


Kennel Assistants

Lisa P

Lisa P. is a welcoming addition to TAH. She has been with us since 2014. All pets seem to gravitate to her friendly manner, including her new puppy Whiloh. Her charm, strength and spunk are a great addition to our team.

Dustin W.

Dustin has spent most of his life rescuing and nursing all types of animals, which made him a natural fit here. He plans to pursue a veterinary technician license. Smart and funny, Dustin is a fantastic member on our team.

Holly F.

Holly's love of animals and bubbly personality can be sure to turn any ones frown upside down! She is currently a Trinity County resident and has a love for adventure! We are glad that she's joined our team!

Jessica M.

Picture and Bio coming soon....

Registered Veterinary Technicians

Kristiina K.

Kristiina graduated from Yuba College in 2014 and joined our team shortly therafter. As a licensed veterinary technician Kristiina has already contributed to the well-being of many of our patients. Her interests in surgery and anesthesia, along with her onward and progressive thinking are driving the hospital to a bright future. Kristiina spends her free time with her dog Tahoe. Welcome to the team !!!

Audri O.

Picture and Bio coming soon....

Brandie S.

Picture and Bio coming soon....

Office Assistants

Amy Schneider

Amy began her career with TAH in 2005. She has worked for in veterinary hospitals since 2000. Amy's skills are useful in every area of the hospital but most recently Amy is expanding her knowledge and skill set in the office and business ends. Amy's dogs Clifford and Oscar are only slightly jealous of the time she spends with all our TAH friends. Amy's knowledge and experience have made a big difference in our team.


Calypso stays busy greeting all the pets, rearranging the counter top supplies, and sleeping in the sunshine. She loves getting her belly rubbed... most days. Everyone loves Calypso.


Bingo, the keeper of the box, spends his time holding down boxes, folders and important documents. His newest hobby is shredding paperwork, he saves us a ton is shredding costs. He is a little shy still and can be seen racing down the hallway. He is a wonderful addition to our family.

Services We strive to provide complete care for our patients. Learn more about all the services we provide. Make An Appointment We will do our best to accommodate your busy schedule. Schedule an appointment today! Online Forms Our patient forms are available online so they can be completed in the convenience of your own home or office.


My dog loves to see all his friends at Trinity Animal Hospital! He can barely wait to get in the door. Dr. Nickerson and Dr. Schlicting treat my dog like he's part of their family, not just a part of mine.

Amy S
Weaverville, CA

DayWeavervilleSatellite Clinics
Tuesday8am-8pmHayfork 9a-5p
Thursday8am-8pmWillow Creek 9a-5p
SaturdayEmergency On Call
SundayEmergency On Call
Day Weaverville Satellite Clinics
Monday Tuesday Wednesday Thursday Friday Saturday Sunday
8am-8pm 8am-8pm 8am-8pm 8am-8pm 8am-8pm Emergency On Call Emergency On Call
Hayfork 9a-5p Willow Creek 9a-5p


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