Your dog seems totally fine. Eating well, tail wagging, happy to go on walks. So it might surprise you to learn that some of the most common — and serious — health threats to dogs show absolutely no signs until things have already gotten bad.
Heartworms, intestinal parasites, and tick-borne diseases are like that. Quiet, invisible, and a lot easier to prevent than to treat. Here is everything you need to know about heartworm, parasite, and flea/tick prevention in North Texas:
Heartworms: the invisible threat and how to prevent them
Heartworms are spread through mosquito bites. When an infected mosquito bites your dog, it deposits microscopic larvae into the bloodstream. Those larvae spend the next six months slowly migrating toward the heart and lungs, where they grow into worms that can reach 12 inches long.
By the time symptoms show up — coughing, fatigue, difficulty breathing — there’s already significant damage happening. Treatment exists, but it’s hard on the dog, takes months, and costs considerably more than a year of prevention.
The frustrating part? Texas is one of the highest-risk states in the country. Warm temperatures and standing water mean mosquitoes are active longer here than almost anywhere else. Year-round prevention isn’t overcautious — it’s just smart.
Annual heartworm testing matters even when your dog is on prevention, because no preventative is 100% foolproof (a missed dose, a medication spit out unnoticed). Testing gives you the peace of mind that prevention is actually working.
Intestinal Parasites: A risk to your pet & to your family
Roundworms, hookworms, whipworms, giardia — these don’t make the news the way other pet health topics do, but they’re remarkably widespread. Studies suggest that a significant percentage of dogs carry intestinal parasites at any given time, often without obvious symptoms.
They spread through contaminated soil, standing water, infected feces, and even through a mother’s milk to her puppies. Dogs pick them up just by being dogs — sniffing, digging, walking through the yard.
Some intestinal parasites, particularly roundworms and hookworms, are zoonotic, meaning they can infect humans too. Kids who play in areas where infected dogs have defecated are especially at risk.
The good news: monthly prevention that covers heartworm often covers intestinal parasites at the same time. It’s one of those situations where a simple, inexpensive habit protects everyone in the household.
Tick-Borne Illness: It’s Not Just Lyme
When most people think tick-borne disease in dogs, they think Lyme disease. But in North Texas, the bigger concerns are actually ehrlichiosis and Rocky Mountain Spotted Fever — both of which are transmitted by the brown dog tick and the American dog tick, both of which are common here.
These diseases attack the immune system and can cause fever, lethargy, loss of appetite, swollen lymph nodes, and in serious cases, organ damage or failure. They’re also notoriously tricky to diagnose because the symptoms look like a lot of other things.
Ticks don’t just live in wooded trails. They’re in backyards, parks, and green spaces. Your dog doesn’t need to go hiking to pick one up.
Tick prevention is about reducing exposure before a bite happens — because by the time you find a tick, it may have already been feeding long enough to transmit disease. And consistent prevention is far simpler than treating a dog who’s become seriously ill.
The Bottom Line
None of this is meant to be scary — it’s meant to be useful. The reality is that the diseases above are largely preventable with a straightforward monthly routine and an annual test. That’s a pretty good deal.
If your dog isn’t currently on heartworm, intestinal parasite and flea/tick prevention, or if it’s been more than a year since their last heartworm test, it’s worth getting that squared away — especially heading into summer.
We’re here if you have questions. Give us a call at (972) 353-9672 or book an appointment online through our convenient booking portal.
