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Caring for your pet isn’t our profession. It’s our calling.
Dr. Mackenzie Gray earned her Doctor of Veterinary Medicine degree from Kansas State University 2023. Upon graduation, she moved back to her home-state of Florida to complete a small animal rotating internship and has been primarily practicing small animal emergency medicine in Southwest Florida since then.
She has special interests in analgesia (pain management) and the important role that it plays in successful wound recovery. During veterinary school she published research exploring methods to improve the clinical efficacy of butorphanol for analgesia in dogs. Ultimately, she received a first-place award for her presentation on this subject during Phi Zeta Research Day at Kansas State University in 2021.
Dr. Gray is passionate about educating owners and guiding them to become active and knowledgeable participants in their pet’s healthcare. She recognizes that pet owners and veterinarians are a team with the shared goal of ensuring their pets live long, healthy, and happy lives.
Dr. Gray shares her home with her three German Shepherds, a Husky, and five cats. During her free time, she enjoys spending quality time with her pets, getting out in nature, and cultivating her small, yet growing, succulent collection. She is also a self-proclaimed ‘foodie’ that enjoys visiting local restaurants but is also quite adept in the kitchen herself after learning how to cook at an early age from her parents. Having grown up in Naples, she is excited to be back to her Florida roots and to support her community through providing high-quality and compassionate veterinary services.
Dr. Castillo is a dedicated Market Support Veterinarian who supports The Old 41 Team, offering invaluable support and expertise to our clients. With a strong background in Veterinary Medicine, Animal Science, and a variety of specialized skills, Dr. Castillo’s extensive education and professional experience make him a trusted resource in animal care. His training includes a Doctor of Veterinary Science from the Agricultural University of Havana, Cuba, and various technical certifications, showcasing his deep understanding of veterinary practices, animal nutrition, and medical procedures. He has worked in research, academia, and clinical settings, contributing to numerous international veterinary publications and projects.
Dr. Castillo is known for his friendly, approachable nature and his team-oriented attitude. He brings a wealth of experience from previous roles as an ICU Veterinarian Technician, Emergency Veterinarian Technician, and General Practitioner, having worked in both private practice and emergency care in Florida. His ability to collaborate seamlessly with our team, along with his professional demeanor, enhances our ability to deliver top-tier care and service to our clients. Dr. Castillo’s commitment to excellence and his passion for animal welfare make him a cherished partner in The Old 41 Team’s mission to provide the best possible veterinary care.
William Pena is an engaging, forward-thinking, bilingual entrepreneurial leader with 15+ years of success developing high-performing teams to drive business success. William is accomplished in working with organizational leaders to establish goals and devise strategies to advance growth. He is a proactive and hardworking individual focused on continuous operational improvements. He graduated from Veterinary School in 2011 and enjoys cooking and offshore fishing.