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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.
 
• Founder of Vida Pharmacal, focused on breakthrough parasitic disease treatments
 • Filed the first veterinary drug patent for anti-T. cruzi activity in dogs
 • Principal scientist for the U.S. military working dog Chagas treatment study
 • Veterinary lead for the Texas Chagas Task Force alongside the CDC and UT Health
 • Pioneer in developing diagnostic and treatment protocols for infected dogs
 
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:
 
 • The more treatment options are available
 • The better heart damage can be managed
 • The higher the chance of improving quality of life
 
Waiting can mean irreversible cardiac damage.

Early Detection. Advanced Treatment. Led by One of the Nation’s Top Experts.

Do not wait for symptoms to appear.

Chagas disease is often silent early on, but warning signs may include:
 
 • Lethargy or decreased activity
 • Fainting or collapse
 • Irregular heartbeat
 • Difficulty breathing
 • Unexplained weight loss
 
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.
 
Your dog’s evaluation may include:
 
 • Comprehensive physical exam
 • Cardiac screening
 • Specialized blood testing for T. cruzi
 • Advanced diagnostics when needed
 
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.
 
Without intervention, Chagas can lead to:
 
 • Heart disease
 • Arrhythmias
 • 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.

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

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.<ul><li>Founder of Vida Pharmacal, focused on breakthrough parasitic disease treatments</li><li>Filed the first veterinary drug patent for anti-T. cruzi activity in dogs</li><li>Principal scientist for the U.S. military working dog Chagas treatment study</li><li>Veterinary lead for the Texas Chagas Task Force alongside the CDC and UT Health</li><li>Pioneer in developing diagnostic and treatment protocols for infected dogs</li></ul>Your pet is being treated by the same expert helping shape how Chagas disease is understood nationwide.

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.Without intervention, Chagas can lead to:<ul><li>Sudden death</li><li>Heart disease</li><li>Arrhythmias</li></ul>

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

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

chagas-disease-ahsv

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

Chagas disease is often silent early on, but warning signs may include:
 
 • Lethargy or decreased activity
 • Fainting or collapse
 • Irregular heartbeat
 • Difficulty breathing
 • Unexplained weight loss
 
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> </div><div> </div>

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<h1 dir="auto">Caring for Senior Cats: What Changes With Age?</h1>Cats are living longer than ever thanks to advances in veterinary medicine, nutrition, and preventive care. While it's wonderful to enjoy more years with our feline companions, aging also brings changes that require a little extra attention.Just like people, senior cats experience physical and behavioral changes as they grow older. Understanding what is considered a normal part of aging, and what may signal an underlying health issue, can help your cat enjoy a healthier and more comfortable life.<h2 dir="auto">When Is a Cat Considered a Senior?</h2>Most veterinarians consider cats to enter their senior years around 7 to 10 years of age, although every cat ages differently.As cats get older, routine wellness visits become increasingly important. Many age-related conditions develop gradually, and early changes can be difficult to notice at home.Regular checkups give your veterinarian the opportunity to monitor your cat's health over time and identify concerns before they become more advanced.<h2 dir="auto">Common Changes You May Notice</h2>Some changes in behavior and activity are expected as cats age.Your senior cat may:<ul><li>Sleep more than they did as a younger cat.</li><li>Spend less time climbing or jumping.</li><li>Play less frequently.</li><li>Become more selective about food.</li><li>Prefer quieter areas of the home.</li></ul>While these changes can be associated with aging, sudden or significant changes should always be discussed with your veterinarian.<h2 dir="auto">Health Conditions Become More Common</h2>As cats age, they become more susceptible to certain medical conditions.Some of the most common health concerns seen in senior cats include:<ul><li>Arthritis</li><li>Kidney disease</li><li>Hyperthyroidism</li><li>Diabetes</li><li>High blood pressure</li><li>Dental disease</li><li>Vision or hearing changes</li></ul>Many of these conditions develop slowly and may not cause obvious symptoms in their early stages. Routine examinations and recommended laboratory testing can help detect problems sooner, when treatment may be most effective.<h2 dir="auto">Don't Overlook Subtle Signs</h2>Cats are experts at hiding illness, making it especially important to pay attention to small changes.Contact your veterinarian if you notice your cat:<ul><li>Drinking more or less than usual.</li><li>Losing or gaining weight.</li><li>Having difficulty jumping onto furniture.</li><li>Using the litter box differently.</li><li>Grooming less or developing a messy coat.</li><li>Becoming withdrawn or unusually vocal.</li><li>Showing changes in appetite.</li></ul>Even seemingly minor changes can provide valuable clues about your cat's health.<h2 dir="auto">Nutrition Matters More Than Ever</h2>A healthy diet continues to play an important role throughout your cat's senior years.Some older cats require fewer calories because they become less active, while others may benefit from diets formulated to support kidney health, joint function, or other age-related needs.Your veterinarian can recommend nutrition based on your cat's individual health, body condition, and medical history.<h2 dir="auto">Helping Your Senior Cat Stay Comfortable</h2>Simple adjustments around the home can make daily life easier for an aging cat.Providing soft bedding, low-sided litter boxes, food and water bowls that are easy to reach, and steps or ramps to favorite resting places can help improve comfort and mobility.Continuing to offer gentle play sessions and opportunities for mental enrichment also supports overall well-being.<h2 dir="auto">Why Wellness Visits Become Even More Important</h2>While annual examinations are important throughout a cat's life, many senior cats benefit from wellness visits every six months.More frequent visits allow your veterinarian to monitor weight, evaluate mobility, assess dental health, and identify changes that may not be noticeable between yearly appointments.These visits also provide an opportunity to discuss any new behaviors, appetite changes, or mobility concerns before they progress.

Learn how cats change as they age, common senior cat health concerns, signs to watch for, and how regular veterinary care can support healthy aging.

Caring for Senior Cats: What Changes With Age?

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Pet acupuncture at () provides gentle, drug-free relief for pain, arthritis, and mobility issues. This holistic therapy boosts circulation, reduces inflammation, and supports healing for happier, healthier pets.

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

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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.

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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.


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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.

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When pets act out, there's almost always a reason. Anxiety, fear, medical conditions, or past trauma can show up as barking, biting, hiding, or destruction. Our job is to uncover the cause and help your pet feel safe again.

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

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A sudden limp. A skipped meal. A look that says something's off. When your pet isn't feeling right, same-day answers make all the difference. 

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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.  

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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. 

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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. 

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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.

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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.

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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.

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


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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.


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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.

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Caring for Senior Cats: What Changes With Age?

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Caring for Senior Cats: What Changes With Age?

Recent Blogs

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Frequently Asked Questions

Is Muddy Creek Animal Hospital AAHA-accredited?

Do you offer evening appointments at Muddy Creek Animal Hospital?

How often should I bring my pet to the vet for a check-up?

Do you offer pet dental care services?

What should I do if my pet shows signs of illness?

What are the most common health issues for senior pets?