You know your pet needs regular vaccines and protection from fleas and mosquitoes, but getting to the vet can feel like a juggling act. Between work, traffic, kids, and busy clinic schedules, preventive care sometimes slips to the bottom of the to-do list.
CityVAX was created for moments exactly like that. Instead of asking you to rearrange your life around a clinic, our team brings affordable preventive care to the places you already go in the greater Houston area. Walk in during our pop-up clinic hours, get your pet protected, and get back to your day.
Our pop-up model focuses on the essentials that keep dogs and cats healthy: low-cost vaccinations, parasite prevention, heartworm testing, and microchipping. For anything outside preventive care, we partner with and refer to full-service veterinary clinics so your pet can get the comprehensive medical attention they need.
Heartworm disease is a serious, potentially fatal condition spread by mosquitoes. In the Houston area, where mosquitoes are active most of the year, regular heartworm testing is one of the most important things you can do for your dog’s long-term health.
Heartworm testing checks to see if your dog has been infected with heartworms. CityVAX offers quick, low-cost heartworm testing at our walk-in pop-up clinics. A small blood sample is taken and run on a test that looks for signs of heartworm infection. The process is simple, and most dogs tolerate it very well with gentle handling and a calm environment.
You can learn more about how this service fits into our preventive care offerings on our Heartworm Testing page.
Because heartworms are spread by mosquitoes, dogs in warm, humid regions like Houston, Pearland, Katy, Rosenburg, and League City are at higher risk. Even indoor dogs can be bitten by a mosquito that finds its way inside. Once infected, heartworms live in the heart and lungs and can cause:
• Coughing and difficulty breathing
• Fatigue and exercise intolerance
• Weight loss
• Heart failure and organ damage if left untreated
Treatment for heartworm disease is lengthy, expensive, and hard on a dog’s body. Regular testing and year-round prevention are far safer and more affordable than treating advanced disease.
When you visit a CityVAX pop-up clinic for heartworm testing, you can expect a focused, efficient experience.
Here is how it typically works:
• You walk in during clinic hours; no appointment is required.
• A team member will guide you through a short intake process and answer basic questions.
• A small blood sample is collected from your dog for the heartworm test.
• The test is run and interpreted by our veterinary team.
• You receive your dog’s results and guidance on next steps, including prevention options.
If your dog tests negative, our team can help you choose appropriate heartworm prevention as part of our parasite prevention and control offerings. If your dog tests positive, we will explain what that means and refer you to a full-service veterinary clinic for full evaluation and treatment options.
Heartworm testing is one crucial part of a bigger preventive care picture. During the same visit, many pet owners also choose:
• Core vaccinations for dogs, such as rabies, distemper, and parvovirus
• Core vaccinations for cats, such as rabies and FVRCP
• Flea, tick, and intestinal parasite prevention
• Microchipping for permanent identification if a pet is lost
You can explore our full range of preventive services on the CityVAX Services page. Our team focuses specifically on these preventive needs and will refer you to a full-service clinic for illnesses, injuries, or other medical concerns outside this scope.
How often should my dog be tested?
Most dogs should be tested for heartworms every year, even if they are on year-round prevention. Dogs that have missed doses, recently moved from another region, or have unknown histories may need testing before starting prevention.
Do indoor dogs really need testing?
Yes. Mosquitoes can and do enter homes, and it only takes one infected mosquito bite for a dog to become infected. Indoor dogs in Houston-area neighborhoods are still at risk and should be tested and kept on prevention.
Can cats be tested for heartworms?
Cats can be affected by heartworms, but testing and treatment are more complex. CityVAX focuses on heartworm testing for dogs. If you have concerns about heartworms in your cat, our team can refer you to a full-service veterinary clinic for feline-specific guidance.
Traditional veterinary visits can be stressful, time-consuming, and difficult to schedule. CityVAX pop-up clinics are designed to make preventive care simpler for Houston-area pet owners.
Walk-In Convenience
There is no need to plan weeks ahead or juggle appointment times. CityVAX clinics are completely walk-in within the posted hours. You choose a location that fits your day, stop by with your pet, and our team takes care of the rest.
Affordable Preventive Care
Because we focus specifically on vaccines, parasite prevention, heartworm testing, and microchipping, we keep our services efficient and affordable. This narrower scope allows us to serve more pets in less time while still providing high-quality preventive care.
Hosted at Familiar Community Venues
Our clinics are held at places you already know: PetSuites, Pet Evolution, Advance Auto Parts, and other neighborhood partners across the Houston area. Many pets and owners find these settings less intimidating than a traditional clinic, which can make visits smoother for nervous dogs and cats.
Fast, Focused Visits
Because we are not performing surgeries, extensive diagnostics, or emergency care, our team can keep visits moving efficiently. You receive targeted preventive services, clear information, and helpful referrals when needed, all in a streamlined experience.
CityVAX is serving pets across Pearland, Katy, Rosenburg, and League City this week. All clinics are walk-in only. No appointment needed — walk-ins welcome for heartworm testing, low-cost vaccinations, parasite prevention, and microchipping during the times listed below.
Thursday, August 27, 2026
Saturday, August 29, 2026
Sunday, August 30, 2026
Tuesday, September 1, 2026
All CityVAX clinics are walk-in only. No appointment needed. Simply choose the date and location that works for you, bring your pet during the listed hours, and our team will guide you through heartworm testing and any other preventive services your pet needs.
Your dog depends on you to protect them from preventable diseases like heartworm. A quick, low-cost test at a CityVAX pop-up clinic can give you peace of mind and help you stay on track with year-round prevention. If you have previous vaccination or prevention records, bring them with you so our team can help you decide what is due and what can wait.
If you are unsure which location is closest or want to see additional upcoming dates beyond this week, visit our Schedule and Locations page for the latest updates. You can also call (832) 281-0559 with general questions about preventive services offered at our Houston-area walk-in pop-up clinics. For any medical issues outside vaccines, parasite prevention, heartworm testing, or microchipping, our team will gladly refer you to a trusted full-service veterinary clinic.
