We have great depth in our team at Colac Veterinary Clinic with expereince and knowledge across our workforce.  We aim to provide a premier and professional service for your farms and pets with experienced vets who have a broad range of skills and capabilities.


Shane Lyons BVSc (Hons) MBA

Practice Owner (Senior Veterinarian)

Dr Shane Lyons joined the practice in 1991 and became a partner in 1993.  Shane along with Ian run the large animal operations.  Shane is a keen fisherman and spends his weekends on the table tennis circuit.  Shane has a keen interest in milk quality and is often running Cups on Cups off courses for budding dairy farmers to improve their milking technique and mastitis prevention.  He is an accomplished equine and cattle veterianrian doing much of our ultrasound cattle and mare pregnancy testing.  Shane has also completed further study in opthamology and regularly gets called in to look at horses, dogs and cats eyes in more complicated cases.

Ian Henderson BVSc

Practice Owner (Senior Veterinarian)

Dr Ian Henderson started the practice with his wife Vonnie in 1986.  Being a true Birregurra local you will commonly find Ian at the Birregurra golf course tending the greens and fairways.  Ian has a keen interest in teaching and has helped countless students and young vets devlop their skills with patience and practical guidance, in 2019 Ian won the Australian Cattle Veterinarians practitioner of the year award for recognition in service to the industry and clients over his long career.  Ians wealth of knowledge and experience, especially with catle and horses, is invaluable amoungst our team.

Evelyn Lyons BVSc (Hons) MANZCVS (Pharmacology)

Practice Owner (Senior Veterinarian)

Dr Evelyn Lyons joined the practice in 1992.  Evelyn oversees the small animal department and when she is not saving your pets she is saving lives down at Apollo Bay SLSC.  Evelyn has completed many knee surgeries and does a number of complicated soft tissue, opthalmic and orthopaedic proceedures.  She also commonly assists our regular in house referral surgeon on his frequent rounds.  Evelyn has completed further study in accupuncture and regularly works with patients to improve mobility and comfort through accupuncture sessions.

Tom Loughnan BVBiol/BVSc MANZCVS (Dairy Cattle Medicine)

Practice Owner (Senior Veterinarian)

Dr Tom Loughnan joined our staff in 2016 after a number of years working through South West Vic, Gippsland and overseas.  Tom is a mixed practice vet with a strong interest in dairy medicine and reproduction.  He joined the partnership in 2019 and has a keen interest in developing protocols and preventative health care to offer our clients greater farm productivity.  Tom has attained his Memberships to the Australian and New Zealand College of Veterinary Surgeons in Dairy Cattle Medicine and is also completing further study through the University of Melbourne to improve his knowledge in dairy medicine.  He is completing a research project with the help of many of our regular clients.

Penny Morrison BVSc


Dr Penny Morrison has been working at Colac Vets since 2015, joining us from JCU in Townsville.  Penny works both on farm and in the clinic being a versatile team member,  She is from Derinallum and happy to be back in the local area with family close by.  Penny is often out exploring the coastline or playing netball for Birre through winter weekends.

Tiana Park BVSc


Dr Tiana Park joined us in 2018 fresh out of North QLD, she is a mixed practice vet and you'll find her in the clinic and on farm.  Tiana hails from a beef farm near Mackay and enjoys exploring the new region on her weekends off.  Recently Tiana has designed and started the Colac Vet Puppy School and is well versed in training and juvenile dog managment,  she's a wealth of knowledge and the puppies and families alike have been finding her sessions invaluable.

Rhonda Mitchell

Front Office Manager

Rhonda is an invaluable member of our staff organising our Vets' appointments and fitting everything into the day.  She's a multi-tasking guru and takes great care of all of our staff and customers.  When Rhonda is not at work she spends time visiting family, tending the veggies or trecking around the world.

Rhonda Colbourne

Veterinary Nurse

Rhonda has been a dedicated member of our team since 1993 veterinary nursing and helping on reception at times.  Rhonda keeps our shelves stocked and patients well tended to, you can be sure that her friendly face will greet you and your pet upon any visit.  With a passion for red frogs and coffee she continues to be a reliable and highly valued staff member.

Jenni Mercuri

Veterinary Nurse

Jenni has worked in our team at Colac Vets between family comitments for years.  She is an accomplished vet nurse and also helps behind the scenes to keep the administration running smoothly. Jenni, with her daughter, is a keen Ballet dancer and has mastered the art of dog training, get in touch if you need some tips with your pet.

Casey White

Veterinary Nurse (Veterinary Nurse)

Casey joined us late in 2019 and has been learning the ropes of reception and veterinary nursing.  She's recently completed her certificate 4 in Vet Nursing and is progressing with leaps and bounds.  Casey hails from Camperdown where you may find her running the rail trails or walking her Cavalier Trixie.

Vonnie Henderson

Practice Owner

Vonnie and Ian started the practice in 1986, Vonnie still holds the after hours phones regularly to make sure your calls are always answered and to organises the on-call vet.

Debbie Larkins


Deb joined us in 2020 down in our Winchelsea branch and has been a fantastic addition to the furniture.  Being a local Deb knows most of our Winch clients and patients from her walks in town with her two West Highland Terriers.  Her presence has enabled us to open for longer hours in Winchelsea making consultation bookings and prescription pickups a much smoother operation.

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