Shop your veterinarian's online pharmacy for pet medications, preventatives, and prescription food. Enjoy home delivery, AutoShip, and savings.

Online Veterinary Pharmacy: Home Delivery & Savings

Keep your dog or cat safe this Halloween with tips for managing anxiety, preventing escapes, avoiding toxic treats, and reducing holiday hazards.

Halloween Safety for Pets: 5 Tips for Dogs and Cats

Learn why preventive veterinary care is important for your pet's long-term health and how wellness bundles can help make routine care more affordable.

Animal Doctors Pet Wellness Bundles: Affordable Preventive Care for Dogs and Cats

Learn how to recognize signs your pet may be overweight and discover simple ways to support a healthy weight through nutrition, activity, and veterinary care.

Pet Obesity Awareness Month: Healthy Weight Tips

Prepare your pet for the unexpected this National Preparedness Month with tips for emergency kits, evacuation plans, identification, medications, and more.

National Preparedness Month: How to Prepare Your Pet for an Emergency

Wed Apr 02 2025 00:00:02 GMT+0530 (India Standard Time)

Animal Doctors

about-us-page

our-history-section

our-teams-section

We are dedicated to providing the highest level of care along with friendly, compassionate service.

why-us-section

app-download-page

blogs-page

blogs-section

book-appointment-page

book-appointment-section

Embedded content

care-memberships

care-plan

career-page

careers-section

Dr. Roy Madigan, D.V.M., is not just a veterinarian. He is one of the leading experts in canine Chagas disease in the United States.
<br><br>
• Founder of Vida Pharmacal, focused on breakthrough parasitic disease treatments
<br>• Filed the first veterinary drug patent for anti-T. cruzi activity in dogs
<br>• Principal scientist for the U.S. military working dog Chagas treatment study
<br>• Veterinary lead for the Texas Chagas Task Force alongside the CDC and UT Health
<br>• Pioneer in developing diagnostic and treatment protocols for infected dogs
<br><br>
Your pet is being treated by the same expert helping shape how Chagas disease is understood nationwide.

Get In Touch

Chagas disease progresses in stages. The earlier it is identified:
<br><br>
<br>• The more treatment options are available
<br>• The better heart damage can be managed
<br>• The higher the chance of improving quality of life
<br><br>
Waiting can mean irreversible cardiac damage.

<b>Early Detection. Advanced Treatment. Led by One of the Nation’s Top Experts.</b>

<b>Do not wait for symptoms to appear.</b>

Chagas disease is often silent early on, but warning signs may include:
<br>
<br>• Lethargy or decreased activity
<br>• Fainting or collapse
<br>• Irregular heartbeat
<br>• Difficulty breathing
<br>• Unexplained weight loss
<br><br>
If your dog spends time outdoors, lives in Central Texas, or has been exposed to insects, they may be at risk even without symptoms.

If your dog may have been exposed to kissing bugs, do not wait. Chagas disease can silently damage the heart before symptoms appear. Early diagnosis can make the difference.

At Central Texas Vet, we go beyond standard testing.
Dr. Madigan is actively developing advanced serologic testing methods to improve detection accuracy.
<br><br>
Your dog’s evaluation may include:
<br>
<br>• Comprehensive physical exam
<br>• Cardiac screening
<br>• Specialized blood testing for T. cruzi
<br>• Advanced diagnostics when needed
<br><br>
Early detection allows for better management and improved outcomes.

Chagas disease is caused by the parasite Trypanosoma cruzi, transmitted by “kissing bugs” commonly found in Texas.
Once infected, dogs may appear normal while the parasite attacks the heart and other organs.
<br><br>
Without intervention, Chagas can lead to:
<br>
<br>• Heart disease
<br>• Arrhythmias
<br>• Sudden death

Questions? We Have Answers

If your dog may be at risk, schedule an evaluation today and get answers from one of the leading experts in the field.

chagas-disease

<p dir="auto">At The Animal Hospital of Smithson Valley, we go beyond standard testing.</p><p dir="auto">Dr. Madigan is actively developing advanced serologic testing methods to improve detection accuracy.</p><p dir="auto">Your dog’s evaluation may include:</p><ul><li><p dir="auto">Comprehensive physical exam</p></li><li><p dir="auto">Cardiac screening</p></li><li><p dir="auto">Specialized blood testing for T. cruzi</p></li><li><p dir="auto">Advanced diagnostics when needed</p></li></ul><p dir="auto">Early detection allows for better management and improved outcomes.</p>

<p dir="auto">Dr. Roy Madigan, D.V.M., is not just a veterinarian. He is one of the leading experts in canine Chagas disease in the United States.</p><ul><li><p dir="auto">Founder of Vida Pharmacal, focused on breakthrough parasitic disease treatments</p></li><li><p dir="auto">Filed the first veterinary drug patent for anti-T. cruzi activity in dogs</p></li><li><p dir="auto">Principal scientist for the U.S. military working dog Chagas treatment study</p></li><li><p dir="auto">Veterinary lead for the Texas Chagas Task Force alongside the CDC and UT Health</p></li><li><p dir="auto">Pioneer in developing diagnostic and treatment protocols for infected dogs</p></li></ul><p dir="auto">Your pet is being treated by the same expert helping shape how Chagas disease is understood nationwide.</p>

<p dir="auto">Chagas disease is caused by the parasite Trypanosoma cruzi, transmitted by “kissing bugs” commonly found in Texas.</p><p dir="auto">Once infected, dogs may appear normal while the parasite attacks the heart and other organs.</p><p dir="auto">Without intervention, Chagas can lead to:</p><ul><li><p dir="auto">Sudden death</p></li><li><p dir="auto">Heart disease</p></li><li><p dir="auto">Arrhythmias</p></li></ul><p dir="auto"></p>

<p dir="auto">Chagas disease progresses in stages. The earlier it is identified:</p><ul><li><p dir="auto">The more treatment options are available</p></li><li><p dir="auto">The better heart damage can be managed</p></li><li><p dir="auto">The higher the chance of improving quality of life</p></li></ul><p dir="auto">Waiting can mean irreversible cardiac damage.</p>

<p dir="auto">Chagas disease is often silent early on, but warning signs may include:</p><ul><li><p dir="auto">Lethargy or decreased activity</p></li><li><p dir="auto">Fainting or collapse</p></li><li><p dir="auto">Irregular heartbeat</p></li><li><p dir="auto">Difficulty breathing</p></li><li><p dir="auto">Unexplained weight loss</p></li></ul><p dir="auto">If your dog spends time outdoors, lives in Central Texas, or has been exposed to insects, they may be at risk even without symptoms.</p>

chagas-disease-ahsv

Chagas disease progresses in stages. The earlier it is identified:
<br><br>
<br>• The more treatment options are available
<br>• The better heart damage can be managed
<br>• The higher the chance of improving quality of&nbsp; life
<br><br>
Waiting can mean irreversible cardiac damage.<div><br></div><div><br></div><div><br></div><div><br></div>

Chagas disease is often silent early on, but warning signs may include:
<br>
<br>• Lethargy or decreased activity
<br>• Fainting or collapse
<br>• Irregular heartbeat
<br>• Difficulty breathing
<br>• Unexplained weight loss
<br><br>
If your dog spends time outdoors, lives in Central Texas, or has been exposed to insects, they may be at risk even without symptoms.<div><br></div><div><br></div>

chagas-disease-ctv

contact-us

copy-of-chagas-disease

Accordion Title

#1f2937

forms-page

form-section

get-in-touch

landing-page

contact-us-section

cta-bar

emergency-branches

faq-section

footer-section

hero-section

otto-widget-section

our-services-section

testimonials-section

vetstoria-widget-section

Financial Aid:

Obedience:

Local Dog Parks:

Boarding Kennels In Our Area:

Microchipping:

Doggie Daycare in our Area:

Adoptions:

General Information:

links-and-resources

news-page

our-history-page

Our <b>East Side Entrance</b> is located on Early Street, across from the Hanover Apartment Building. Our <b>North Side Entrance</b> is located on Irby Avenue, across from Woody’s Cheesesteak.

parking

payment-info-page

payment-information-section

payment-section-3

promotions

services-page

service-page-section

team-page

teams-page-section

video-page

pixel_google

pixel_facebook

Header Cookie Consent - 671f33c5d8e9f7c6b5f082c9

cookie_settings_1750955345987

<button id="ot-sdk-btn" class="ot-sdk-show-settings">Cookie Settings</button>
 

cookie_list_1750955346272

cookie_microsoft

<p dir="auto">It used to be commonly accepted that dogs didn’t see in color. And this is mostly because longtime dog fancier and past publisher of Dog Week magazine, Will Judy, declared in 1937 that dogs had poor vision and could only see single shades, tones, general outlines, and shapes. Since those long-ago days, dog vision has been extensively researched. And while not everything is known about canine vision, we do know they can see some colors and do not live in a world of black and white. This article will discuss what dogs can see and why they can see some colors.</p><h2 dir="auto" style="line-height: 1.1"><strong>How The Eye Works</strong></h2><p dir="auto">It’s fairly simple to understand how the eye works, about how a dog’s vision differs from a human’s. Color is <em>seen</em> by the eye’s nerve cells. The retina is made of cells and receptors, which are called rods and cones. Rods are what a person or animal needs to detect motion and help with varying shades of light, and cones aid in differentiating colors.</p><p dir="auto">People who are not color-blind can see three color combinations, which are red, green, and blue, because they have three types of cones. Dogs only have two types of cones, which are yellow and blue. This two colored vision is called dichromatic. Normal vision for a dog is most like a human who has red-green color blindness. In humans, there are two kinds of color blindness. In addition to red, green color blindness, people can also have blue, yellow color blindness. Like dogs, people who have red, green color blindness are not able to distinguish between those colors and will see them as brownish or gray.</p><h2 dir="auto" style="line-height: 1.1"><strong>Colors Dogs See</strong></h2><p dir="auto">Research and conclusions about canine behavior and eye structure show pretty clearly that dogs can’t see all of the colors people do, but they can see some colors. Compared to humans, dogs see a limited number of colors. Through current research, it’s believed that dogs have a unique color spectrum in which yellow and blue are the dominant colors in their vision. Violet, blue, and blue-green take on shades of blue. And to dogs, reds and greens are probably closer to browns and grayscale.</p><h2 dir="auto" style="line-height: 1.1"><strong>Why Dogs See Limited Colors</strong></h2><p dir="auto">Through research, it was discovered that canine eyes have a structure that is developed for nocturnal hunting. Their eyes adapted to see well in darkness and to discern movement. Canines have a larger lens, corneal surface, and reflective membrane (tapetum) for enhanced night vision. Light bounces from the membrane, allowing the eye to take in more light, strengthening night vision. This reflection is what makes a dog’s eyes seem to glow in the dark.</p><p dir="auto">Their retina is made of millions of light-sensing cells. And dogs have more rods than human beings have, which also improves low-light vision. But dogs have fewer cones than humans do. Humans have three kinds of cones, whereas dogs only have two. Dogs do not have red-green cones. The red-green cones are also the ones missing in color-blind people.</p><p dir="auto">Dog’s eyes evolved to let them thrive in the wild. Not only did their vision become suited for night hunting, but to allowed them to know, through motion detection, when they were being hunted and needed to flee. These visual adaptations still remain with dogs today, even though most will never need their inborn hunting abilities.</p><h2 dir="auto" style="line-height: 1.1"><strong>How Dog And Human Vision Compare</strong></h2><p dir="auto">While dogs may not be able to see true color depth, or the range of colors people can see, they can perceive different colors. To a dog, shades of red would appear brownish-gray. While yellow, green, and orange all take on yellow hues. Blues and purples are seen as blue hues. Other visual differences are, dogs are more near-sighted than humans, and their vision is not as sharp as humans'. Additionally, dogs are not as sensitive to changes in brightness. But oddly enough, dogs do have some visual advantage over people. Dogs have a broader range of peripheral vision than people because their eyes are set more to the sides of the head. But a smaller range of visual acuity results in less depth perception. And their pupils dilate maximally, which gives them as much light as possible. They can see even small movements at a great distance.</p><h2 dir="auto" style="line-height: 1.1"><strong>Visual Accommodations</strong></h2><p dir="auto">You should keep your dog’s visual differences in mind when you choose toys and products for him. Purchase items in colors he can see. It’s probably wise to stay away from red, pink, and orange-hued toys and stick with yellow or blue. A red ball could easily be lost in the grass as it blends in. When your dog runs right past the toy, it isn’t because he has low intelligence; it’s because he can’t see it. Yellows and blues will be the easiest for him to see. &nbsp;He’ll be more inclined to play with a toy that’s easier to spot in the grass.</p><h2 dir="auto" style="line-height: 1.1"><strong>Conclusion</strong></h2><p dir="auto">We now know our canine friend’s vision is very much like a human who has red, green blindness. We know he sees better at night, and he has a broader visual range, because of eye placement, than people do.</p><p dir="auto">Understanding how dogs see, and why, is beneficial to anyone who wants to know why their dog sometimes cannot find toys, such as a red ball thrown into the grass. Red and orange are popular colors for dog toys, and unfortunately, those are bad choices. It would be much wiser to purchase items in yellow and blue for your dog friend. This may be the reason some dogs seem to love yellow tennis balls. If we use the knowledge of how dogs see, we can understand their behavior better and deepen our relationships with them.</p><p dir="auto">Dogs adapted to live the wild hunting life, but today they are our friends and companions. The more we learn about dogs, the better we can enjoy every moment we spend with them. They enrich our lives, and we do the same for them, through knowledge, our bonds can only grow stronger.</p><p dir="auto">&nbsp;</p><p dir="auto"><strong>If you need to schedule an appointment for your pet, please visit ().</strong></p><p dir="auto"><br></p>

It used to be commonly accepted that dogs didn't see in color. And this is mostly because longtime dog fancier and past publisher of Dog Week magazine, Will Judy, declared in 1937 that dogs had poor vision and could only see single shades, tones, general outlines, and shapes.

Do Dogs See Color?

gtm_67ec30aadd3917d9289b57d4

Join our veterinary team at Animal Doctors!

animaldoctors

Thank you for considering our hospital as your pets provider of veterinary services. We are dedicated to maintaining the health of your pet and look forward to many future years together.

Compassionate and quality care for your pets.

Served over 10,000 fur babies and their happy families.

<p>To help us provide the best care possible, payment is required at the time of service. We accept cash and all major credit cards, and we are happy to offer a no-interest payment plan through CareCredit.</p>

CareCredit

Trupanion Pet Insurance

ScratchPay

Mr. Dog Training

Tree Frog Farm Personalized – Dog Training and Agility

Brunswick Maine Dog Park

Great Island Kennel

Pet Sitters of Maine

The Brown Dog Inn

Camp Bow Wow

Falmouth Happy Cats

Home Again

The Blue Dog Daycare

Happy Paws Unleashed

Midcoast Humane

Passion for Pets Rescue Organization

Coastal Maine Great Dane Rescue

VeterinaryPartner.com

The Indoor Pet Initiative

Feline Fix by Five

Traveling Out of the Country with Your Pet

AAHA Pet Health Library

Pet Poison Control

Free Exam for New Clients! See Below for Details.

Consult Online

Online Store

Pet Portal

Forms

Download App

Below are some answers to our most common questions.

Additional Services

General Services

Speciality Services

Laser therapy is a non-invasive treatment that uses light to stimulate healing and reduce pain in animals.

Laser Therapy

Saying goodbye is the hardest part of loving a pet. When that time comes, you deserve clarity, comfort, and the space to make decisions with peace of mind.

End-of-Life Support

When your pet needs medication, trust and convenience matter. At (), we prescribe and dispense medications directly from the team whos seen your pet, knows their health history, and understands their specific needs.
No guessing, no delays, and no unnecessary confusion.


Pet Prescriptions

Skin issues are one of the most common reasons pets end up at the vet, and they're also some of the most frustrating. Allergies, infections, or even food sensitivities can all cause your pet discomfort.

Dermatology & Allergy Care

Nutrition is the foundation of good health, and a powerful tool in managing weight, energy, chronic conditions, and even behavior.

Pet Nutrition

Your pet can't tell you when something's wrong. That's why regular wellness exams are so important. These visits give us the chance to catch health issues early, before they become painful or costly.  

Wellness Exams

Bad breath isn't just annoying - it's often a sign of deeper health issues. Dental disease in pets can lead to oral pain, local or systemic infection, tooth loss, and even heart, liver, or kidney complications. 

Dental Care

Fleas, ticks, and intestinal worms are not just a nuisance, they are dangerous. These tiny pests can cause serious health issues like Lyme disease, heartworm disease, and tapeworms. 

Parasite Prevention

Vaccines are one of the most important tools we have to protect pets from serious, often deadly diseases. Whether you have a rambunctious or a relaxed pet, vaccinations help your pet build strong immunity and avoid preventable illness.

Vaccinations

Comprehensive surgical services, from routine procedures to complex operations, all are performed with expert care.

Pet Surgeries

When your pet isn't acting like themselves, diagnostic testing helps us find the reason. From bloodwork, urine testing, and fecal exams to x-rays, these tests give us a window into what's happening inside, so we can take action before things get worse.

Diagnostic Testing

When pets get sick or injured, you want answers fast. Advanced imaging gives us a deeper look, without invasive procedures.


Advanced Diagnostic Imaging

Permanent ID for Peace of Mind. A collar can come off. A tag can get lost. But a microchip is a permanent, tamper-proof way to make sure your pet always has a way home. At (), we offer safe and simple microchip implantation, so your pet stays connected to you, no matter what.

Pet Microchipping

Discover hidden dental issues before they cause pain with pet dental radiology at (). Our veterinary dental X-rays reveal infections, bone loss, and tooth damage beneath the gum line, ensuring safer, more effective treatment. Non-invasive and included in every comprehensive dental cleaning, dental radiographs for pets help protect your pet's health, comfort, and smile for years to come.


Dental Radiology

Spaying or neutering your pet is one of the most important decisions you can make for their long-term health. It helps prevent certain cancers and infections, curbs unwanted behaviors, and reduces the number of orphaned pets in shelters.

Sheet title

Do Dogs See Color?

Recent Blogs

Related Blogs

The World Through the Eyes of Your Pet

Frequently Asked Questions

Sheet title

Do Dogs See Color?

Recent Blogs

Online Veterinary Pharmacy: Home Delivery & Savings

Halloween Safety for Pets: 5 Tips for Dogs and Cats

Animal Doctors Pet Wellness Bundles: Affordable Preventive Care for Dogs and Cats

Related Blogs

The World Through the Eyes of Your Pet

Frequently Asked Questions

Do you offer discounts for new pet owners visiting your hospital?

Can I schedule a same-day veterinary appointment for my pet?

Do you have another location nearby?

What are Animal Doctors' hours?

Do new clients get a discount on their first visit?

Do you offer discounted wellness packages for preventive care?