How does a dog act when they have worms?

Pet owners often miss subtle changes in their dog’s behavior that signal worms, since many signs can seem like regular doggy habits at first. A normally energetic pup might start lagging during walks, stopping to lie down more often or showing less interest in their favorite toys—these shifts in energy are easy to brush off, but they’re common early clues. You might also notice them scratching or rubbing their rear on the carpet more than usual, a telltale sign they’re uncomfortable from intestinal parasites.

Changes in eating habits and bathroom behavior are harder to ignore, and they’re also key indicators. Some dogs with worms will eat more than normal but still lose weight, while others might turn up their nose at meals entirely. When it comes to potty time, keep an eye out for loose stools, visible worms (they might look like small white threads), or even blood in their waste—these are clear signs you need to act fast. In many regions, vets are required by law to report certain types of parasitic infections, so skipping a checkup isn’t just risky for your dog; it could also mean missing legal compliance steps.

Behavioral quirks tied to discomfort can also show up, especially in younger dogs or puppies. A dog with worms might seem more irritable, snapping or growling when you touch their belly, since abdominal pain is common with intestinal parasites. They might also drink more water than usual, as worms can cause dehydration, or vomit occasionally—even a single episode of vomiting with visible worms (like roundworms, which look like spaghetti) means an immediate vet visit is necessary. Remember, many areas mandate regular deworming for puppies and adult dogs, so staying on schedule isn’t just good care; it’s often a legal requirement.

Preventing worms is easier than treating them, and it ties into everyday habits most owners already have. For example, picking up your dog’s poop right away in parks or yards stops worm eggs from spreading to other pets or even humans—many local laws require this to keep public spaces safe. Avoid letting your dog eat raw meat or scavenge in trash, as these are common ways to pick up parasites. Regular vet visits, including deworming treatments, not only keep your dog healthy but also ensure you’re following any breed-specific or regional regulations about parasite control.

Knowing how your dog acts when they have worms helps you spot issues early, keeping both your pet and your household safe. By staying alert to changes in energy, eating, and bathroom habits, and sticking to legal requirements for deworming and waste cleanup, you can prevent small problems from turning into bigger health risks. Your vet is your best resource here—they can tailor treatments to your dog’s needs and make sure you’re meeting all local rules, so you both can enjoy a happy, healthy life together.