What Our Clients Say

Everyone at On-Site is incredibly competent, compassionate, and genuinely committed to excellence in their care. Beyond that, their commitment to patients (and their human companions) feeling loved and relaxed at visits is something I’ve never experienced in veterinary care. Working with them has produced a marked, positive change in the well-being of my entire pack.

Colorado On-Site Vet is the most caring, well-organized, thorough veterinarian office I have ever seen. I appreciate the attention and love that our pets receive from Dr. O’Brien and the entire staff, knowing that their care is top-notch. Love Beatrice, Charlie, Gypsy and RIP-Lilly.

Excellent staff. They were kind and caring with my dog. No detail was overlooked concerning the health and well-being of my pup. I will highly recommend Susan and her team to anyone looking for the best health care for their pets.

I cannot say enough good things about Dr. Susan O’Brien and her clinic! The care and attention my dog received were truly exceptional. From the moment we walked in, the staff was warm and welcoming, and Dr. O’Brien took the time to thoroughly examine my dog, explaining every step of the treatment plan. Her kindness, professionalism, and deep knowledge made me feel confident that my pet was in the best hands. It’s clear that she genuinely cares about animals, and it shows in the results. I wouldn’t trust my dog’s health to anyone else. Highly recommend!

My husband and I are truly grateful to Susan O’Brien, DVM, and the entire team. Bruno became ill, and Susan and her team were so gracious to get him in immediately. They were able to get him assessed and treated, as well as thoroughly explain his medication follow-up treatment. Susan always remembers Bruno, and I never have to explain his history; she always remembers all his little ailments. We are so grateful we found Susan, I would consider her and the team family, the way they care for the love of my life, Bruno.

We love Dr. O’Brien and her team. They take very good care of my girls and make sure they are as healthy as they can be. Truly grateful for their kindness!