Dr. Ivan Mayor

Doctor of Veterinary Medicine

Dr. Mayor graduated from University of Mexicali, Mexico and have been in the Veterinary field for over 20 years. When arriving to the United States, Dr. Mayor had a rare opportunity to intern at the iconic San Diego Zoo. He has also practiced Veterinary Medicine all over San Diego County which helped him expand his knowledge, sharpen his skills, and made him an expert in General practice for small animals which allowed him to open our beautiful All Day Pet Hospital. Aside from his specialty in General practice, he has had experience in emergency care and worked with our community by working in spay and neuter clinics.

Throughout his two decades of work experience, he has found professional experience in dermatology, dentistry, emergency medicine, and general surgeries. He also loves interacting with clients and giving your loving pets the best possible care and he takes a lot of pride in what he does. All clients are treated like family and every pet will receive the best care and treatment available. Regardless of financial issues, Dr. Mayor will find a way to work with you in the best interest of your pet with his years of experience.

Aside from his love for Veterinary Medicine, Dr. Mayor loves to spend time with his wife and two kids. Family is very important to him and that is why he wants his clients to feel comfortable leaving their pets with us and knowing we will treat them like family. He also owns his precious schnauzer, Grenas (Hairy face), and maltipoo, Peluche (Stuffed animal), so he understands how much impact your pets mean to you. On his days off, he takes advantage of our beautiful San Diego weather and hiking, biking, and camping on our beautiful trails.


Dr. Alonso Bayon

Doctor of Veterinary Medicine

Doctor Bayon graduated with honors from the Institute of Veterinary Science at the University of Baja, California in 1997. After passing all the rigorous examinations that are established by the examination commission for foreign Veterinary graduates, he became a licensed Veterinarian in the United States in June of 2002. He completed his license at UC Davis and Oklahoma State University, schools of Veterinary Medicine. During the last 18 years as a practicing Veterinarian, he has held positions as Chief of Staff and Medical Director in general practices as well as Emergency Animal Hospitals.


During his years at Orange County Emergency Pet Clinic, he was a mentor and evaluator of 3rd and 4th year Veterinary students doing ER rotations. His areas of interest in Veterinary medicine are emergency and critical care, soft tissue surgery, challenging internal medicine cases. He also enjoys getting to meet and interact with his patients from puppies and kittens and caring for them up until their senior years.

The rewards of saving animal lives, providing optimal preventive care to them, and educating pet owners about their furry family members health such as nutrition and behavioral enrichment is also one of his favorite aspects of being a Veterinarian. Compassionate and sincere care to all his patients and their owners is imperative to him! Besides his full-time commitment to his career he enjoys road cycling, mountain biking, carpentry, adventures, traveling that involves wildlife conservation, and spending quality time with his friends and family. We are very happy to have him here at All Day Pet Hospital and he looks forward to serving you!


Dr. David Demner

On-Call Surgeon

David Demner, DVM, Diplomate, ACVS (Board certified veterinary surgeon) graduated from the National University of Colombia in 2003. Upon graduation, he joined their soft tissue surgery department for advanced training in surgery for two years and then became assistant professor. David moved to California and after a rotating internship, he completed his residency in surgery at a private practice in Southern California. He passed the certifying examination and became Board Certified by the American College of Veterinary Surgeons and after 5 years of working as a surgeon in a private practice, he founded Veterinary Mobile Surgical Specialist – VMSS. Dr. Demner’s vision is to offer excellent care to patients that need surgical care at a reasonable price. He enjoys all aspects of surgery, but his specific interests include orthopedic, and soft tissue surgery.


Veterinary Technician

This is Maria and she's been in the veterinary field for 3 years now. She is currently going to to school to get my associates degree in animal science and wants to work with exotics. She has an 8 year old chihuahua mix named Mimi who is a ball of attitude and love put together.


Get In Touch

  • 10175 Rancho Carmel Dr 128
    San Diego, CA 92128

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