Houston pets spend a lot of time outdoors, from neighborhood walks to weekends at the dog park. That is great for exercise and enrichment, but it also means more exposure to mosquitoes. In our warm, humid climate, those mosquitoes can carry heartworms that quietly put your dog or cat at risk.
Many pet parents worry that preventive vet care will be expensive or hard to fit into a busy schedule. Between work, family, and traffic, getting to a traditional clinic during limited hours can feel stressful. CityVAX was created to make essential preventive care easier, more affordable, and closer to home.
CityVAX brings low-cost, high-quality preventive veterinary services to you through walk-in pop-up clinics hosted at familiar neighborhood spots across the greater Houston area. You can stop by while you run errands, pick up the kids, or visit your favorite pet store, and your pet can get the protection they need without a long, complicated visit.
Heartworm disease is a serious, potentially fatal condition that affects the heart and lungs. It is spread by mosquitoes, which are common throughout Houston, Pearland, League City, Katy, Missouri City, and surrounding communities. The good news is that heartworm disease is preventable, especially when you stay on top of regular testing and prevention.
Heartworm testing is a quick screening that checks whether your pet has been infected with heartworms. At CityVAX pop-up clinics, our team uses a small blood sample to look for signs of heartworm infection. Results are typically available during the same visit, so you can discuss next steps right away.
For dogs, regular heartworm testing is recommended even if they are on prevention. Missed doses, late refills, or vomiting after a dose can leave a gap in protection. For cats, heartworm disease can look very different and may be harder to detect, which is why prevention and veterinary guidance are especially important.
The Houston region has one of the highest heartworm risks in the country because our mosquito season is long and intense. Even mostly indoor pets can be bitten by a mosquito that finds its way inside. Once a dog or cat is infected, heartworms grow and live in the heart and blood vessels, which can lead to coughing, fatigue, and serious organ damage over time.
Early detection is much safer and less expensive than treating advanced disease. Regular testing helps your veterinarian decide when it is safe to start or continue heartworm prevention and when further care at a full-service clinic is needed. CityVAX focuses on making that testing step easy and budget friendly so more pets stay protected.
When you visit a CityVAX pop-up clinic for heartworm testing, you can expect a straightforward, efficient experience:
• A team member will greet you and gather basic information about your pet.
• A small blood sample will be taken for the heartworm test.
• You will receive your test result during the same visit in most cases.
• Our staff will explain what the result means and whether you should follow up with a full-service veterinary clinic for additional care.
CityVAX focuses on preventive services. If your pet’s test result or symptoms suggest active heartworm disease or another medical concern, we will recommend that you follow up with a full-service veterinarian for full diagnostics and treatment options.
Heartworm testing is just one part of a complete preventive care plan. During your visit, you can also take advantage of other low-cost services, including:
• Core vaccinations that help protect dogs from rabies, distemper, and parvovirus, and cats from rabies and panleukopenia.
• Flea, tick, and parasite prevention and control to keep your pet comfortable and reduce the spread of parasites in your home and yard.
• Pet microchipping so your pet can be quickly identified and reunited with you if they are ever lost.
These services are designed to work together to keep your pet healthy and protected. If your pet needs care beyond preventive services, such as illness treatment or surgery, the CityVAX team will recommend that you visit a full-service veterinary clinic.
CityVAX clinics are built around convenience and accessibility. All of our Houston-area locations are walk-in. There is no need to schedule ahead, join a waiting list, or rearrange your entire day. You simply come during the posted hours, check in, and our team will help you as quickly as possible.
Because CityVAX focuses only on preventive care services like vaccinations, parasite prevention, heartworm testing, and microchipping, visits are typically faster and more streamlined than a traditional clinic appointment. This focused model helps reduce wait times, keeps costs lower, and can make the experience less stressful for both pets and people.
Our pop-up clinics are hosted at familiar neighborhood locations such as PetSuites, Pet Evolution, Dogtopia, YMCA facilities, AutoZone and Advance Auto Parts parking lots, and other community venues. Many pets feel more relaxed walking into a place they already know, and many owners appreciate being able to combine a vet visit with regular errands.
CityVAX brings walk-in preventive care to neighborhoods across Pearland, League City, Richmond, Missouri City, Texas City, Webster, Katy, Fulshear, Spring, and Houston. Every pop-up clinic listed below is walk-in only. No appointment is ever needed. Check the details, choose the location that works best for you, and stop by during the posted hours.
For the most current dates, times, and added locations, always check our upcoming pop-up clinic schedule.
No appointment needed — walk-ins welcome at every location.
Pearland Location
Venue: PetSuites Pearland
1234 Example St
Pearland, TX 77581
Date: Saturday, May 4
Time: 10:00 a.m. – 1:00 p.m.
Special note: Look for our tent in the front parking lot.
League City Location
Venue: Pet Evolution League City
5678 Sample Blvd
League City, TX 77573
Date: Sunday, May 5
Time: 11:00 a.m. – 2:00 p.m.
Richmond Location
Venue: Dogtopia Richmond
9012 Richmond Pkwy
Richmond, TX 77469
Date: Saturday, May 11
Time: 9:00 a.m. – 12:00 p.m.
Special note: We will be set up inside the lobby area.
Katy Location
Venue: Advance Auto Parts Katy
3456 West Katy Dr
Katy, TX 77450
Date: Sunday, May 12
Time: 10:00 a.m. – 1:00 p.m.
Houston Location
Venue: YMCA Houston
7890 Community Ln
Houston, TX 77024
Date: Saturday, May 18
Time: 9:30 a.m. – 12:30 p.m.
Again, this is a sample of how our rotating schedule looks. For the exact locations, addresses, and times for this week, visit our live CityVAX schedule and locations page.
Whether your dog or cat is due for a heartworm test, needs to get started on parasite prevention, or is behind on vaccinations, CityVAX makes it simple to catch up. Just bring your pet, any prior vaccination or medical records you may have, and a secure leash or carrier. Our team will guide you through available preventive options during your visit.
If you have questions about what services your pet might need or which location is most convenient, you can call CityVAX at (832) 281-0559, or reach out through our contact page. Then check the latest schedule and locations, choose a nearby pop-up clinic, and stop by during walk-in hours to give your pet the protection they deserve.
