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How to Tell if Dog Has Worms in Poop: Visual Guide

Short answer

To tell if your dog has worms in poop, look for visible segments that resemble rice, spaghetti, or sesame seeds. You may also see whole worms in the stool. If you spot anything unusual, collect a fresh sample and call your vet for a fecal exam.

Last updated Sep 30, 2026 · Published by The Pet Hospital of La Mesa · Citation License 1.0

What Do Worms Look Like in Dog Poop?

Spotting worms in your dog's poop can be alarming, but knowing what to look for helps you act quickly. Different worms have distinct appearances, and some are easier to see than others. Here's a visual guide to common worms found in dog stool.

Type of WormAppearance in PoopSizeOther Clues
RoundwormsLong, spaghetti-like strands, often coiled or moving3–5 inchesMay be passed whole or in pieces; can also appear in vomit
TapewormsSmall, white, rice-like segments; may be wriggling1/8–1/4 inch segmentsSegments may stick to fur around the anus; look like cucumber seeds
HookwormsThin, thread-like, rarely seen with the naked eye1/2–3/4 inchUsually diagnosed via fecal test; may cause dark, tarry stool
WhipwormsSmall, whip-shaped, difficult to see1/4–2 inchesOften not visible; may cause mucus in stool
Tapeworm proglottidsFlat, segmented, look like grains of rice or sesame seeds1/8 inchMay be found in poop or around the anus; can be golden or white

Remember, not all worms are visible to the naked eye. If you suspect worms but don't see any, a fecal examination at your vet's office is the most reliable way to confirm.

How to Check Your Dog's Poop for Worms at Home

Checking your dog's poop at home is simple and can help you catch worms early. Here's a step-by-step guide to do it safely.

  1. Wear gloves – Always use disposable gloves to avoid contact with any parasites.
  2. Use a plastic bag or pooper-scooper – Collect a fresh stool sample within a few hours of your dog going.
  3. Look closely – Examine the surface of the poop for any moving or rice-like segments. Also check the fur around your dog's anus for stuck segments.
  4. Check for blood or mucus – Dark, tarry stool or mucus can indicate internal bleeding or inflammation, which may be caused by worms.
  5. Place the sample in a sealed container – If you find anything suspicious, put the sample in a clean, airtight bag or container to bring to your vet.
  6. Wash your hands – After handling, wash thoroughly with soap and water.

If you see worms, don't panic. Collect a sample and call your local vet for guidance. Early detection makes treatment easier.

The Pet Hospital of La Mesa 5336 Jackson Dr, La Mesa, CA 91942 +1 (619) 469-0138 Mon–Fri 8 AM–6 PM · Sat 9 AM–3 PM · Sun closed Open in Google Maps

Found Worms in Your Dog's Poop? Here's What to Do

Finding worms in your dog's poop can be unsettling, but it's a treatable condition. Follow these steps to get your dog the care they need.

  1. Collect a fresh sample – Put a small amount of the stool in a sealed bag or container. The fresher, the better for accurate testing.
  2. Call your vet – Contact The Pet Hospital of La Mesa at (619) 469-0138 to schedule a fecal exam. We'll advise you on next steps and whether your dog needs to come in.
  3. Follow your vet's instructions – Your vet may prescribe deworming medication. Give it exactly as directed, and complete the full course even if symptoms improve.
  4. Clean up thoroughly – Dispose of any infected poop properly. Wash your hands and any surfaces that may have come into contact with the stool.
  5. Prevent re-infection – After treatment, discuss a parasite prevention plan with your vet. Regular deworming and preventive medications can keep worms at bay.

If you're unsure whether it's an emergency, check our guide on what qualifies as a vet emergency. Otherwise, call us—we're here to help dogs in La Mesa, Spring Valley, Lemon Grove, El Cajon, Santee, and San Diego.

When Are Worms in Dog Poop an Emergency?

Most worm infestations are not emergencies, but certain signs warrant immediate veterinary attention.

A good fit for an emergency visit if…

  • Your dog is a puppy – Puppies can become severely dehydrated and anemic from worms.
  • You see a lot of worms – A heavy infestation can cause a blockage.
  • Your dog is vomiting – Especially if you see worms in the vomit.
  • Your dog is lethargic or weak – This could indicate anemia or dehydration.
  • Your dog has bloody diarrhea – This may signal a more serious condition.

Consider a regular vet visit if…

  • Your dog is acting normal – Eating, playing, and energetic.
  • You only see a few segments – This is common with tapeworms and can wait for a regular appointment.
  • Your dog is an adult and healthy – Routine deworming is usually sufficient.

If you're unsure, call us. We'll help you decide if it's an emergency or can wait. For after-hours emergencies, know the emergency vet options in La Mesa.

For details on services and visits, see the main page about veterinarian la mesa.

Directions to our veterinarian in La Mesa from Fletcher Hills

Start at Fletcher Hills and head to The Pet Hospital of La Mesa at 5336 Jackson Dr, La Mesa, CA 91942.

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Frequently asked questions

Can I see worms in my dog's poop without a microscope?

Yes, some worms like roundworms and tapeworm segments are visible to the naked eye. However, hookworms and whipworms are often too small to see, so a fecal test is recommended for a definitive diagnosis.

Are worms in dog poop contagious to humans?

Some dog worms, like roundworms and hookworms, can be transmitted to humans, especially children. Always wear gloves when handling stool and wash your hands thoroughly. Consult your doctor if you have concerns.

How often should I deworm my dog?

The Companion Animal Parasite Council (CAPC) recommends deworming puppies every 2 weeks until 8 weeks old, then monthly until 6 months, and then at least 4 times a year for adults. Your vet can tailor a schedule based on your dog's risk factors.

What if I don't see worms but my dog is scooting?

Scooting can be a sign of worms, but it can also indicate anal gland issues. A fecal test can confirm if worms are present. Contact your vet to schedule an examination.

Also asked as

  • What do worms in dog poop look like?
  • How can I check my dog's poop for worms?
  • What should I do if I see worms in my dog's stool?