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"You and Your Pets are Part of Our Family"

General Info

Award Winning Customer Service: Voted the Top Two Animal Hospitals in St. Charles County in 2009, 2010, and 2011 By the Citizens of St. Charles County

"Each time we come to your fantastic clinic I am reminded of how professional, compassionate & friendly everyone is. I don't know how you do it, but you do it 100% of the time." Nancy Slocum Creve Coeur, MO

Compassionate Doctors & Staff That Will Treat You & Your Pet Like Family:

 "Everyone there makes the time to answer all of our many questions and concerns. The staff is very compassionate and understanding. They treat us like family." Joan Hunt Florissant, MO

We are Privately, Family-Owned, NOT a National Corporate Chain: Unlike large nationally owned, corporate chains, our primary focus is customer service, not corporate profits.

"It was about 12 minutes past closing but I was greeted with a smile, and she took the time to let me make my purchase. Very nice and attentive ladies. If it were a chain store, they would not have bothered to open the door and welcome me in. It is warm service like that, which will keep me coming back." Jean Harper O'Fallon, MO

Affordable Pricing & Payment Options: Unlike the large corporate-owned hospitals, we do not have high-priced executives running the show. We pass this savings on to you.

"We have been going to a different vet for 15 yrs with different pets and we are now switching to you guys. Services are much more affordable and great customer service." Lisa Buckles Lake St. Louis, MO

Giving Back to the Community: When you spend money at our hospitals, a portion of the money is used to save the lives of hundreds of homeless pets each year.

"They donate their time to treat hundreds of injured and sick dogs and cats every year that would otherwise have to be euthanized. I do not know of any other animal hospital that is as dedicated to saving homeless pets." Katie Willis St. Charles County Humane Services

Going the Extra Step: Our goal is not just to satisfy you but to go beyond your expectations.

"The doctor actually took our Pomeranian home with him for several days to administer medication and for observation. That's above and beyond." Charles Dobbins Chesterfield, MO

Only the best Doctors: Our doctors require twice as much continuing education as required by state law ensuring that your pet will never be a victim of a lack of knowledge.

"The doctor gave my new pet a more thorough exam than any other of my pets have had in the past at other clinics." Colleen Jones O'Fallon, MO

Never Pay an Exam Fee: Purchase one of our membership plans and never pay an exam fee!

Money Back Guarantee: We are so confident you will be happy with our service that we back it up with a 100% Money Back Guarantee. If you are not 100% happy with our service, just tell us, and we will give you a 100% refund.


Regular Hours

  • Surgery: We are equipped to perform almost any surgery your pet will every need ranging from spays and neuters to surgeries as complex as hip replacements.
  • Medicine: Capable of handling most medical illness seen in dogs and cats.
  • Emergency Care: We see all emergencies the same day.
  • Radiology: Including x-rays and ultrasound.
  • State of the Art Equipment: Including laser surgical equipment, endoscopic equipment, blood and eye pressure monitoring equipment, complete in-house blood testing, and fully equipped dentistry suite.
  • Routine Preventative Care: Including vaccinations, heartworm testing, stool testing, etc.




Payment method
check, debit, discover, financing available, visa, master card
  • Gentle Doctor Animal Hospital: "located at the intersection of Highway K and N in O'Fallon, Missouri in front of Schnucks and behind Chevy's Restaurant and Firestone Tire and Auto."
  • Tender Care Animal Hospital: "located at the intersection
  • FREE Physical Exam & Consultation on Your First Visit: See our Coupons for more special offers.
  • Curbside Service: We will deliver your pet's food, medication, etc to your parked car for your convenience.
Pet Services, Veterinarians, Veterinary Information & Referral Services, Veterinary Clinics & Hospitals, Animal Health Products, Veterinarian Emergency Services, Veterinary Specialty Services
Other Information

Specialties: Dentistry


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Great Clinic!

I bring my very expensive dogs to this clinic because they are the best vet team around. I drive from out of town for these folks, especially Dr. Heather Wise, to take care of my animals. They are flexible and have fit my animals in their schedule on short notice. Compared to my previous vets this animal hospital is very competitively priced. Their puppy packages are a money saver! Dr. Wise is also very good and knowledgeable about bunnies, which can be hard to find. I will continue to do business with this clinic.




I wouldnt bring my ferrets here again. Yes there friendly nice people here. But they made a huge mistake which resulted in having to put my little guy down. I had brought my ferret (Zayne) in cause he was urinating blood. They weigh him in his crate and said they would weigh the crate later. X-rays concluded that he had bladder stones, so we went with the $700 surgery. They called when he was ready to be picked up. Saying that they had trouble waking him up from anesthesia and that he want breathing on his own, but they got him to wake up.

The first night with him he was a happy little ferret. Then it just went down hill from there. He was really staining to use the restroom, then started not to eat/ drink, absolutely no energy and became very bloated. So we took him in cause we felt something was very wrong. But they had ensured me everything was normal. The next day after trying to force feed/ UV fluids and it was about 5 days trying this. He started puking up clotted blood, I just knew something had to be wrong. So I called the vet and told them how concerned I was and they told me they would call me right back. An hour went by and no call. So I just brought him in him in anyways. Come to find out he had an ulser and his kidney were failing. And there was nothing they could do. So I had to put him down. They had have him too much anesthesia by not by weighing him in the crete and not weighing the crete later on. So his body began to shut down. They had no clue about ferrets and I will never bring my other ferrets here.



Both Gentle Doctor and Tender ...

Both Gentle Doctor and Tender Care Animal Hospitals have wonderful and caring veterinarians, techs, and staff. Dr. McCool, aka Dr. Bob, began caring for my four-legged kids in 1998 at Suburban Animal Hospital in North County. When he and Dr. Lori opened Tender Care and Gentle Doctor, I drove the 25+ mile trip rather than going to any of the vet clinics closer to my home. It has been worth the drive to take my feline and ferret kids to Gentle Doctor and Tender Care where I know they will get first-rate care. When I walk through the doors at Gentle Doctor and Tender Care, I feel like my four legged kids are the only patients they see. Everyone is professional and compassionate and go the extra mile to ensure my kids receive the best treatment possible so they can have an excellent quality of life.

When my ferret kid Siduri started to experience seizures in late 2009, Dr. Bob began a course of treatment so she could have a relatively normal ferret life. I called him weekly to keep him updated on Siduri's condition. If he was not available, I talked to Dr. Judy who then gave Dr. Bob the update. Being able to talk to Dr. Bob and Dr. Judy made it easier for me to provide Siduri with the care she needed when she had a seizure. We worked as a team to ensure Siduri maintained a good quality of life for as long as possible. In late November 2010, Siduri's seizures increased in both frequency and duration. Dr. Judy patiently listened to me as I was struggling with doing what was best for Siduri. She and Dr. Bob suggested trying another seizure medication in hopes of stabilizing Siduri's seizures. It was the medication of last resort. Unfortunately, the seizures continued. On Monday, December 6, 2010, I called Tender Care to let them know Siduri was in grave condition--her medications were having little effect on her seizures. Dr. Judy was there when I brought Siduri in. She was not quite ready to give up on Siduri. So, I agreed to allow Dr. Judy to try to get Siduri's seizures under control. For a short while, Siduri's seizures subsided. She responded to me when I gave her one of her favorite treats. However, the seizures returned. I called my husband at work and we decided it was time end Siduri's suffering. After getting her footprint in a clay heart with a small lavender flower, Siduri died peacefully in my arms with one of her favorite toys lying next to her. Dr. Judy and the rest of the Tender Care staff gave me privacy so Freya (Siduri’s sister) and I could say our final goodbyes.

Over the years when it came time to say good-bye to one of our kids, everyone at Gentle Doctor and Tender Care mourned with my husband and I so we did not feel alone in our grief. Siduri’s passing was no different. After some comforting hugs from Dr. Judy and others, I do not believe there was one dry eye at Tender Care when I took Freya home. Dr. Bob called me the next day, which help ease my grief a little. I truly appreciated him taking time out of his day to call me.

I am forever grateful to Dr. Bob, Dr. Judy, Dr. Julie, and the many wonderful staff members for the care and support they have given not only to my kids but to my husband and me as well. Thanks!

I have been going to Gentle Do...

I have been going to Gentle Doctor for several years with my cats but it was just recently that I found out how much they really care for animals AND humans. Not long ago, I experienced an emergency situation with a dog ( I'm not the owner). I called the Gentle Doctor and even though I was very upset, the receptionist remained calm and listened. She did not hesitate when I asked if I could bring the dog in right away. When I got to the clinic, I had been crying because I thought for sure the little dog would need to be put to sleep. Everyone was patient and kind to me. Dr. Melissa came in and listened to the whole long story, examined her and stated she thought she could be nursed back to health but that it would be a long recovery. I was stunned but very happy. Since then, I have been back most days to visit and she has made a fantastic recovery. The staff state how much they love having her around and how precious she is. I honestly believe that without their love, she would not be at the recovery stage that she is in. They live up to the name, Gentle. I don't think I could ever find another group of people as loving, caring and dedicated as those at Gentle Doctor Animal Hospital.



My first visit to Tender Care ...

My first visit to Tender Care was to euthanize my dog. This was my first experience with them. The staff was so compassionate and comforting to me during such an awufl time. They let me take all the time I needed with my dog to say goodbye. It was a kindness I will never forget.

So when I adopted 2 new dogs the local animal shelter recommended Tender Care for follow up medical treatment. No surprise with that because the staff is awesome! They are the most compassionate and kind people I've ever had treat my dogs. I am always greeted warmly when I arrive with my dogs. Each staff member is introduced to me by name. The vets, recently it was Dr. Judy, get on the floor with the dogs to make them feel comfortable. No slipping off a cold, metal examining table. It helps to reduce the stress to my dogs. Before any shots or treatments are given, you are shown the bill first. That way there are no surprises. I felt like Dr. Judy gave my dogs a thorough annual exam checking their ears, mouth, paws, etc. My dogs are overweight and Dr. Judy gave me sound advice on how to reduce their weight and recommending I bring them back in a month for a re-weigh. I feel like they really care about me and my pets. They have flexible hours so we can usually be worked into the schedule.



I have been a client at Gentle...

I have been a client at Gentle Doctor/Tender Care Animal Hospital since bringing home my puppy this past December and have been impressed with every facet of their care. Most recently, my puppy became ill and I had to make a last-minute appointment at the hospital. The staff was accommodating, professional, and caring—I didn’t have to wait to have a doctor see her and they didn’t make me feel rushed. Throughout the course of the visit, the staff was personable and patient: they each introduced themselves and made my puppy comfortable with them, explained precisely what course of action they recommended in a way I could understand, and made clear the cost and level of necessity of each action. In addition to being reminded (as I am at every visit) to call anytime I had questions or concerns, I even received a follow-up phone call from her technician the following morning to check on her recovery and answer any additional questions I had. I feel confident that my puppy would be safely and lovingly cared for by any of the members of staff.



I have been a client of Gentle...

I have been a client of Gentle Doctor since 2004. I have several pets, and they take care of each one like they are their own. Recently I had to put down my 14 year old cat, he had been sick for a very long time but because of the guidance and care of the staff I was able to have him for 2 years longer than expected. Everyone is professional, caring, and the doctors are some of the brightest, they take the time to explain the best course of care. Thanks for all you do.



I have come to GDAH for about ...

I have come to GDAH for about 4 years now, I have always had a positive experience. The staff is awesome and the prices are reasonable. Our last visit I was nervous about my cat being put under sedation and Tara eased my mind completely by explaining the caution that is taken. Thank you so much!



What a wonderful place to take...

What a wonderful place to take your furbabies!! Dr. Melissa and the staff at Gentle Doctor Animal Hospital are so compassionate and personable. They are always so informative no matter what questions you have and always so happy to answer them. The facility is very clean and in a great location. There is no other place I would take my dog and trust that she was in good hands.



I have a 4 month old Shichon n...

I have a 4 month old Shichon named Cubbie, who I brought to Tender Care Animal Hospital to be spayed. I can't tell you how pleased I was with their service! Everyone was very informative and professional. The doctor even agreed to see me before Cubbies' procedure to answer any and all of my questions, while the nurse was in that back figuring out a way to save me money for Cubbies' last set of shots! This place is amazing! Not only do they love working with animals in general.. they LOVE your animal, and from the time you drop him/her off they will treat your baby like it's their own!! Thank you for taking such great care of my little Cubbers'!