Dr. Sergio B. Pereira
Dr. Pereira was born and raised in the Azores, Portugal. After visiting family in the US several times he decided to move to the US and finish his academic training. Dr. Pereira arrived in the US in January of 1999 and started his academic journey at Merced Community College in Merced California. He then transferred to UC Davis. Dr. Pereira attended St. George’s University School of Veterinary Medicine, in Grenada W.I. and received his Doctor of Veterinary Medicine degree on June 17th 2006. Dr. Pereira received his clinical training from Kansas State University School of Veterinary Medicine.
Upon graduation, Dr. Pereira started working for a Dairy Practice in the Central Valley in California. On January 1st of 2012, he started his own veterinary practice, Azores Veterinary Practice. Dr. Pereira’s main professional interests include bovine veterinary practice and general surgery.
Dr. Pereira is married to Dr. Maria I Rodriguez and they have a son, Sebastian and a daughter, Angela. Dr. Pereira and Dr. Rodriguez met while attending Veterinary School. When having some free time Dr. Pereira enjoys watching soccer, traveling back to the Azores and Puerto Rico and working on expanding his hobby farm.
Dr. Celso Koetz, PhD
Dr. Koetz graduated in Veterinary Medicine at the Federal University of Rio Grande do Sul / Brazil, has a master’s degree in Animal Reproduction at the Federal University of Rio Grande do Sul / Brazil, and a PhD in Animal Science at the Londrina State University/Brazil and Postdoc at the Animal Science department at the Federal University of Rio Grande do Sul / Brazil.
His experience in animal breeding are on the following subjects: bovine reproduction, embryo transfer, ovum pick up (OPU), beef cattle genetic evaluation programs, bull reproductive potential evaluation using noninvasive tools like color Doppler ultrasound and infrared thermography, timed artificial insemination, and beef cattle production systems.
Dr. Patricia Koetz
Dr. Patricia Fávaro Koetz was born and raised in Brazil, she graduated in Veterinary Medicine in 2015 by University of Northen Paraná, Brazil. Right after Veterinary School, she started a Master’s Degree in Animal Science, researching about thermoregulation and US Doppler in bulls as well as sperm morphology, finishing the program in 2017.
During an externship at Azores Veterinary Practice, California-USA in 2018 she met Dr. Pereira. Back in Brazil she worked for a year with Equine Reproduction, one of her passions, until immigrating to the US in 2019. She lived in Oregon with her husband Dr. Koetz and their son Carlos for three years where she had the opportunity to work as an Embryologist in one of the biggest Bovine In-Vitro fertilization laboratories in the U.S.
Her major interest includes embryo and oocyte development and collection, advanced reproduction technology, equine reproduction, and dentistry. Always with an open mind, Dr. Favaro is willing to learn and get out of her comfort zone.
On days off, she enjoys traveling abroad with her family, hiking to the mountains or exploring wineries with friends.
Dr. Luis Guilherme Magon De Souza
Dr. Luis Guilherme Magon De Souza was born and raised in the vibrant state of Parana, Brazil. His passion for cattle began from a very early age working on his grandfather’s farms. He graduated from the University of Northern Parana with a degree in Veterinary Medicine in 2017. During his clinical year, Dr. De Souza completed a three-month externship at Azores Veterinary Practice and one month with Mid Valley Large Animal Service in California. For the last 5 years, Dr. De Souza has been gaining experience managing a Dairy Farm, and breeding cows with Semex.
Dr. De Souza’s interests are in advanced reproduction, breeding support, embryo transfer technology and surgery. On his free time, Dr. De Souza enjoys traveling, working out, playing sports, being outdoors and riding horses.
Dr. Vladimir Tadic
Dr. Tadić was born and raised in Alberta, Canada, by his family who immigrated from former Yugoslavia in 1995. In 2019, he received a Bachelor of Science in Agriculture Majoring in Animal Science from the University of Alberta. With being a recent addition to the team, he received his Doctor of Veterinary Medicine in May 2024 from the University of Calgary. After completing a month-long externship at Azores Veterinary Practice in February of 2024, he felt compelled to come back and work with the great team and continue making an impact in the food animal world.
He considers himself an agriculture advocate, or better yet an Agvocate as mainstream media calls it. He looks forward to servicing our existing clients while also expanding and making Azores Veterinary Practice a staple within the geographical area and beyond.
Dr. Tadić’s interests revolve around all things that are production animal related. This includes beef and dairy reproduction, goat, sheep and pig surgical procedures and medicine, herd data analysis and consulting, general equine medicine and lastly business advancement and entrepreneurialism. He also enjoys putting the great world of agriculture, and the life of a food animal veterinarian, on display for the world to watch on his YouTube and Instagram @DrVladTheVet. Follow along if you would like! He looks forward to meeting as many of you as possible and exploring what California and its great producers have to offer!
Dr. Nicole Herb
Dr. Herb is a California native. She grew up in the suburbs but has always had a soft spot and great appreciation for livestock. The more livestock classes and summer externships she did during vet school, the more she felt a calling towards the field. She graduated from UC Davis school of veterinary medicine in May of 2025 and is excited to be an intern veterinarian at Azores Veterinary Practice. She has a special interest in preventative medicine and feels very fulfilled caring for livestock and their producers. She is looking forward to providing a valuable service to the clients and patients of the Central Valley!
She plans to own a variety of animals in the future but for now she has a low maintenance leopard gecko and tarantula as pets. In her free time, she likes to try to take care of plants, read, learn Spanish and be outside with her family and husband.
If you have any questions about our services, please contact us today at (209) 245-7477.