Signs Your Dog Has Worms

The most common signs your dog has worms include visible worms or worm segments in the stool, a swollen or “pot-bellied” abdomen, weight loss despite a normal appetite, and a dull, dry coat. Worms are one of the most common health issues we see at Brookfield Animal Hospital, and they’re sneaky. A dog can be infected for weeks before an owner notices anything unusual, which is exactly why so many pet parents in Brookfield, WI search for these symptoms after spotting something that just doesn’t look right.

 

 

What Are the Most Common Signs Your Dog Has Worms?

Different types of worms cause slightly different symptoms, but several signs tend to show up across the board. If you notice any of the following, it’s worth scheduling a visit with Brookfield Animal Hospital so our team can run a stool test and confirm what’s going on.

• Visible worms or rice-like segments in the stool or near the rear end
• A swollen, bloated, or “pot-bellied” appearance, especially in puppies
• Diarrhea, sometimes with blood or mucus
• Vomiting, which may occasionally contain visible worms
• Noticeable weight loss even though appetite stays normal or increases
• A dull, dry, or thinning coat
• Low energy or lethargy
• Scooting or excessive licking around the rear end

Not every dog with worms shows obvious symptoms right away. Some dogs, especially adults with strong immune systems, can carry a mild worm burden with few or no visible signs at all, which is part of why routine fecal testing matters even when a dog seems perfectly healthy.

What Do Worms Look Like in Dog Stool or Vomit?

One of the clearest signs your dog has worms is actually seeing them. What they look like depends heavily on the type of worm involved, which is why a veterinary fecal exam is so useful for identifying exactly what you’re dealing with.

Tapeworms

Tapeworm segments often look like small, moving grains of rice stuck to the fur around a dog’s rear end or in fresh stool. Dogs typically pick up tapeworms by swallowing fleas, so a tapeworm sign can also be a clue that flea prevention needs attention.

Roundworms

Roundworms are long, thin, and spaghetti-like in appearance. They’re especially common in puppies, who can be born with roundworms passed from their mother or pick them up shortly after birth.

Whipworms and Hookworms

Whipworms and hookworms are much harder to spot with the naked eye since they’re tiny and rarely visible in stool. These types are usually only confirmed through a microscopic fecal exam, which is one more reason visible symptoms alone shouldn’t be the only way you check for worms.

Can You See Worms Around a Dog’s Rear End?

Yes, in some cases you can see worms or worm segments around a dog’s rear end, particularly with tapeworms. If your dog is scooting, licking, or seems unusually itchy in that area, take a look at the fur nearby. Small, rice-sized segments that move are a strong sign your dog has worms and warrant a call to Brookfield Animal Hospital.

What Causes Worms in Dogs?

Dogs pick up worms in more ways than most owners expect, which is why even dogs that rarely leave the yard can end up infected. Common sources include:

• Ingesting flea eggs or adult fleas during grooming
• Sniffing, licking, or eating contaminated soil or grass
• Drinking from puddles, ponds, or other contaminated water sources
• Eating infected rodents, birds, or other small wildlife
• Contact with another dog’s contaminated stool
• Transmission from a mother dog to her puppies before or after birth

Because so many of these exposure routes are part of everyday dog life, like sniffing the ground on a walk, worms aren’t a reflection of poor care. They’re simply a common part of dog ownership that’s worth staying ahead of with regular preventive care.

How Are Worms in Dogs Diagnosed?

The most reliable way to confirm worms in dogs is a fecal exam performed at a veterinary clinic. A small stool sample is examined under a microscope for eggs or larvae, which can identify worm types that aren’t visible to the naked eye. At Brookfield Animal Hospital, fecal testing is a quick, straightforward part of routine wellness visits, and it’s the most accurate way to know for certain whether your dog has worms rather than guessing based on symptoms alone.

Can Worms in Dogs Spread to Humans?

Some intestinal worms in dogs, including roundworms and hookworms, can spread to people in rare cases, usually through accidental contact with contaminated soil or stool. Children, who are more likely to play in dirt and put their hands near their mouths, carry a slightly higher risk. Routine deworming, prompt pet waste cleanup, and regular handwashing after yard work all help keep this risk low for the whole family.

How Often Should Dogs Be Tested or Dewormed?

Most veterinarians recommend a fecal test at least once or twice a year for adult dogs, with more frequent testing for puppies, since they’re especially vulnerable to roundworms and hookworms. Dogs that spend a lot of time outdoors, around other animals, or in areas with wildlife may benefit from more frequent screening. The right schedule depends on your dog’s age, lifestyle, and risk factors, which is exactly the kind of thing our team at Brookfield Animal Hospital can help map out at your dog’s next visit.

Are Puppies More Likely to Show Signs of Worms Than Adult Dogs?

Yes, puppies are generally more likely to show signs of worms than adult dogs, and the symptoms can show up more dramatically. A young puppy’s immune system hasn’t fully developed yet, so a worm burden that an adult dog might handle with mild symptoms can hit a puppy much harder. Common signs in puppies include:

• A noticeably round, swollen belly that looks out of proportion to the rest of the body
• Poor growth or weight gain compared to littermates
• Frequent diarrhea or vomiting
• A coat that looks dull or rough instead of soft and full

Because puppies are so commonly born with roundworms already present, most veterinarians recommend starting a deworming schedule early and continuing it through the first several months of life. This is one of the reasons puppy wellness visits at Brookfield Animal Hospital include parasite screening as a standard part of care.

Schedule a Wellness Visit at Brookfield Animal Hospital

If you’ve noticed any signs your dog has worms, whether it’s a visible segment, a change in appetite, or a coat that’s lost its shine, it’s worth getting a professional answer rather than waiting to see if symptoms pass. Brookfield Animal Hospital offers fecal testing and parasite prevention plans for dogs throughout Brookfield, WI. Give us a call today to schedule a visit so our veterinary team can check your dog and recommend the right next steps.