Chico Animal Hospital is a full service veterinary hospital offering a wide range of services and treatments. Our Clinic is unique in that we are the only clinic in the North State that offers some of these services for both dogs and cats.


An animal with behavioral problems can be disruptive to the human-pet bond. We offer both medicinal and herbal therapies, plus our staff is trained with different behavioral modification techniques for your pet. We also work closely with several excellent pet behaviorists in this area-please refer to the Behavioral link in the navigation bar on this website.

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Chico Animal hospital Offers boarding for dogs, cats and other small pets. We offer comfortable care for your pet with both indoor and outdoor facilities. A grass outdoor exercise area is available for your dog. Our boarding staff is looking forward to caring for your family pet while you are on vacation.
If your animal is on medications, our boarding facility will be able to provide medications to your pet while you are out of town. Also, our veterinarians are available to check on and treat your animal when you are not available.

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Proper dental hygiene is essential for the health of your pet. Dogs and cats suffer from many forms of dental disease. in fact, periodontal or gum disease is the number one illness found in both dogs and cats. Dental disease if not treated can cause serious problems for your pet, ranging from gum inflammation and tooth loss to bad breath (plaque build-up on the teeth that causes that lovely dog or kitty breath!!)’ to infection and organ damage, along with the pain and the discomfort that can result. However, dental disease can be prevented by yearly examinations, home care (such as brushing the teeth) and dental cleanings as determined by the veterinarians at our clinic. Some dogs may go their whole life without a cleaning, while others such as the small breed dogs like the Maltese and Poodle, may need more than a cleaning once a year. This can be determined by an exam with our veterinarians.

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Our clinic is equipped to handle emergencies for your pet, and your pet will be seen as soon as possible upon arrival at the clinic.  If at all possible, we would appreciate a phone call that your emergency is coming to our clinic.

If your emergency occurs during when we are closed, we recommend going to the North Valley Veterinary Emergency Clinic which is located at 2500 Zannella Way in Chico. Their phone number is 899-1720 please see their icon on our website.

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Saying good bye to your friend can be a difficult decision.  Our clinic's policy is to make this decision as easy and comforting to both you and your pet.  Pet owners are free to be present or leave during the procedure.  We use an anesthetic so that no discomfort is perceived by the animal, and your friend passes quickly.  Our clinic offers a separate quiet room for both you and your pet with a separate entrance and exit for you comfort during this difficult time. After the euthanasia, the owner can spend as much time as they would like with their pet to aid in closure.  Prior to the euthanasia, pet owners should decide on how the pet's body will be cared for.  This helps with the emotional stress during and after the procedure.   Our clinic provides a range of options from burial to private cremation services.  The goal of the Chico Animal Hospital is to make sure that the last days of a pet's life can be comfortable and can reflect the care and love that the pet received throughout its life. 

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Flea and Tick Control

Fleas and ticks are a huge problem in our area.  Fleas can cause allergic skin reactions, make the animal miserable from the constant scratching, and can render the animal anemic (fleas suck so much blood from the animal that the animal can become anemic, or they can even die from blood loss.) Fleas can also transmit tapeworm eggs to your pets. Ticks can transmit several diseases to your pet, which can make the animal very sick or can even cause death.  Fortunately, we have several products designed for flea and tick control in you pet. Feel free to stop by our clinic and ask the front desk which flea control is right for your small animal friends.  We do not recommend buying you flea control at the supermarket or at a non-veterinarian source. Most of these products have either a high or even toxic dose of pyrethrins in them. Fleas have developed a resistance to pyrethrins, so the companies have increased the concentration of the pyrethrins in the products to try and kill the fleas. We have seen several animals get sick, or go into seizures, or even die from these over the counter products. 

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Heartworms are a real present danger in our area.  Heartworms live in the hearts and lungs of infected dogs and are transmitted from infected dogs to healthy dogs through the bite of the mosquito.  Some common signs of the disease are coughing, difficulty breathing, sluggishness and weight loss.  However, recently infected dogs may show no signs of the disease. If left untreated, heartworm disease may be fatal to your dog. 

We are now also seeing heartworm disease in cats. Most of the cats that we see infected show no external signs. They may be acting normal at home, and then fall over dead.  Unfortunately, there are no treatments for cats once they are infected. 

At the Chico Animal Hospital, we carry several types of preventatives for the heartworm infection.  Stop by the clinic and ask our staff at the front desk which prevention is right for your pet. If your dog has never been on the prevention, or has been off of the prevention for more than six months, we will need to run a sample blood test here at the clinic (getting the results in 10 minutes) to check if you dog has been infected or not.

An ounce of prevention is worth a pound of cure with our enemy - the heartworm. 

As a side note- there have now been reported cases of heartworm infections in humans whose immune systems have been compromised. 

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Home Again ID Chip

The #1 cause of pet death is getting lost! Over 10 million pets get lost every year, and without proper identification, 90% of them do not return home. 

Micro-chipping is a simple, easy way to permanently identify your pet. A small microchip is placed under the skin: this can be done quickly at the clinic without anesthesia.  The chip contains a number that can identify both you and your pet. The chip can be easily scanned for the identification. If your pet is lost, there is an 800 number that can be called 24/7, and all shelters and clinics will be contacted immediately that your pet is lost.

Over the years, our clinic has returned several pets to their owners with this system. Please call us if you interested in having this permanent ID system done.


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For your convenience, we offer a large well stocked pharmacy to meet the needs of your pet, enabling you to pick up you pet's medications at a time of you visit.  We also offer a pharmacy on-line service (please see the Scriptwrite icon) allowing you to order medications directly from the convenience of your home that will be sent directly to your home.

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Unfortunately, our pets cannot tell us verbally what is wrong with them.  Just as in human medicine the veterinarian has to rely upon laboratory services to diagnose ailments in pets. We have recently updated and added a full in house diagnostic lab along with using a highly reputable laboratory for diagnostic on your pets' skin, blood, urine and feces. Our laboratory also allows us to be in direct contact with both board certified pathologists and internists for quick analysis of your pets' laboratory results.

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One thing that Chico Animal Hospital takes pride in, is offering nutritional advice for the health of your pet. It is our belief that a lot of the aliments that we see in pets now days can be linked to dog and cat foods that are for sale in the world. 

Most of the commercial pet foods that are available, are basically junk food.  Most are high in carbohydrates (such as corn) that are a cheap form of energy.  These foods are also high in by products (think of it- what EXACTLY is a by product??) along with chemical preservatives. These things greatly stress the animals' immune system and cause toxic inflammation in the body and skin.  Our clinic carries several varieties of dog and cat foods that have been proven to be healthy, high quality foods for the health of your pet.  Stop by and talk to our staff and tour our staff and tour our extensive climate controlled food room to see what is available for your family friend. 

Our clinic also offers advice on home cooked diets and raw diets to aid your pet in recovering from illness and to maintain its health. 

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Pain Management

One new field that has recently appeared in the veterinary field is the use of pain control to aid in the treatment of illness, with chronic debilitating diseases, and with post surgical recovery.  Chico Animal Hospital offers several modalities for controlling pain in you friend; from oral and topical medications, to herbal formulas, to acupuncture.  We also offer training the owner in both message techniques and with home physical rehabilitation, for control of pain, thus allowing for a faster, pain free recovery for your pet.

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Chico Animal Hospital has in house radiology which allows for quick diagnosis of your pets' aliments. We have recently updated and added advanced digital radiology to our services.  Digital radiology gives a much clearer diagnosis on your pets' condition.  Radiographs can be used to detect arthritis, fractures, bony tumors and other forms of cancer.  They can also be used to detect heart problems, bladder or kidney stones, stomach or intestinal foreign bodies (it is amazing what dogs and cats will eat sometimes!!) and lung diseases, such as pneumonia. The clinic also offers the services of a board certified radiologist for a rapid consultation on your pets' radiographs. 

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All types of surgeries can be performed at the Chico Animal Hospital, for simple laceration repairs to complicated orthopedic surgeries are performed in our up to date, spacious and sterile surgery suite. During all of the surgical procedure, your pet will be closely monitored for blood pressure, heart rate, and oxygen saturation in the blood, along with electrical monitoring of the heart.

For complicated and specialized surgical procedures, we do offer the services of a board certified surgeon, and these surgeries will be done at our clinic.

Our goal at the Chico Animal Hospital is to provide the utmost in safety and comfort for your pet before, during, and after the surgical procedure.   

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Low Cost Vaccination Clinic

Vaccines are critical for health and well being of your pet, protecting them from potentially deadly viral diseases such as Distemper, Parvo, Leptospirosis and Rabies in dogs , and Panleukopenia, Feline Leukemia, and Rabies in cats.

The clinic's philosophy on vaccinations, is that we feel that a lot of medical problems that we see in our pets'  now days, may be the result of the over vaccination of our pets.  Chico Animal Hospital was the leader in reducing the number of vaccines of our pets.  Chico Animal Hospital was the leader in reducing the number of vaccines that we inject into our pets, along with setting up a vaccination protocol according to the animals' needs.  We also recommend separating out the vaccines that are given to your pet.  Too many vaccines given at once can over stress the animals' immune system.

Except for Rabies vaccination, we do not recommend vaccinating sick, debilitated, or animals with cancer, as vaccines can make their conditions worse.  Please ask one of our veterinarians about what they recommend for your pet.

Vaccinations should be started in puppies and kittens between 6 to 8 weeks of age, and be given every three weeks until the kitten is 3 months old, or the puppy is 4 months old. 

The Rabies vaccination is given at 3 months of age to kittens, and 4 months of age in puppies. The vaccine is boostered a year later, then is given every three years after that.

We also recommend testing kittens for the Feline Leukemia and Feline AIDS viruses at 9 weeks of age.  Both of these diseases can be fatal, and be transmitted to other cats. 

To help with the cost of protecting your pet, we offer reduced cost vaccination clinics; Every Thursday from 2:00 to 5:30 PM by appointment, and one walk in vaccination clinic one Saturday a month- usually the first Saturday of the month.  Please call our clinic (342-0518) to find out when the clinics are and / or to schedule a time. 

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Acupuncture is rapidly gaining acceptance as a form of treatment for diseases and conditions of your pet. Acupuncture is painless, and involves the insertion of thin tiny needles into the surface of the body. Dr. Callen has been doing acupuncture at the hospital for over 10 years, and every day, we are still amazed at the results.

Please call the clinic if you are interested in acupuncture for your pet. Initially, we will set up an Eastern Medicine exam for your pet, which usually takes about a half of an hour. Please see the Eastern Medicine Exam form icon.

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Herbal Medicine

Herbal medicine has been in practice for over 2000 years in many countries, and is just starting to gain acceptance in the United States.  Dr. Callen is certified in herbal medicine, and is offering to treat your pet in this modality instead of the usual route where your pet is pumped full of antibiotics, steroids, and pain killers.  It is amazing how many chronic and ever untreatable conditions have been turned around using this approach. Please contact us if  you are interested in the route of treatment. 

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This is a special radiograph technique of the canine hip for the evaluation of the hip laxity and the potential for hip dysplasia (genetic malformation of the hip which will lead to painful and debilitating arthritis.)

This is a technique that can be done as young as 4 months of age, and gives a better diagnosis than the conventional OFA technique that cannot be done until the animal is 2 years of age- (see the report at the article icon.)

We highly recommend that this evaluation be done for any potential breading dog before they are used for breeding, or for dogs that are going to be used in the field.  For more information, please see the Penn-HIP icon at our links site.

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