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*Updated June 26, 2025*
Dogs are curious by nature. Whether it’s chasing squirrels, sniffing through bushes, or stalking backyard reptiles, their instincts can sometimes get the best of them. If your dog just ate an iguana or lizard, your first instinct may be panic — but don’t worry. Here’s a complete guide covering every possible concern, Are Iguanas Poisonous to Dogs? What to Do If Your Dog Eats One.
Why Do Dogs Eat Lizards or Iguanas?
Dogs often eat lizards or iguanas for a straightforward reason: instinct. The quick movements of a lizard or iguana trigger a dog’s prey drive. Some breeds, like terriers, have powerful hunting instincts and are likelier to pounce on small reptiles.
Are Iguanas or Lizards Harmful to Dogs?
Not all lizards are dangerous, but certain health risks can occur if your dog ingests one:
Bacterial Infections (Salmonella)
Reptiles, including iguanas and many common lizards, frequently carry Salmonella. Dogs exposed to this bacterium can suffer from:
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Vomiting
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Diarrhea (sometimes with blood)
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Fever
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Lethargy
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Loss of appetite
In rare cases, dogs can become severely dehydrated or even septic if untreated.
Parasites
Some lizards harbor intestinal parasites like roundworms or flukes. These can be transmitted to your dog and cause:
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Weight loss
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Digestive issues
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Malnutrition
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Poor coat condition
A fecal exam is often required to detect these parasites, followed by deworming treatment.
Physical Blockages or Choking
Swallowing a lizard or iguana whole, or ingesting sharp bones, can cause:
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Choking (especially in small dogs)
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Intestinal blockage, which may require surgery
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Mouth or throat injuries from claws, tails, or bones
Toxicity or Poisoning
Most lizards in North America are not venomous. However, some species, such as Gila monsters (southwest U.S.) or exotic pet reptiles, can be toxic.
If your dog is exposed to one of these species, seek emergency care immediately.
In places like Florida, large green iguanas can become toxic if they decompose due to bacterial buildup and the release of chemical compounds during decay.
Symptoms to Watch For After Your Dog Eats a Lizard
Monitor your dog for the next 24 to 72 hours. Even if your dog seems fine right away, delayed symptoms can still occur.
Common signs of trouble include:
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Persistent vomiting or gagging
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Diarrhea or mucus in stool
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Loss of appetite
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Excessive drooling
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Swollen abdomen
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Lethargy or restlessness
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Fever or warm ears/nose
If your dog shows any combination of these symptoms, contact your vet promptly.
Immediate Steps to Take If Your Dog Eats an Iguana or Lizard
Here’s a clear action plan:
Step 1: Stay Calm
Don’t panic or try to induce vomiting without professional guidance.
Step 2: Secure Any Remains
If part of the lizard is left behind, collect it in a sealed bag. It can help your vet identify the species and assess the risk.
Step 3: Rinse Your Dog’s Mouth
Rinse your dog’s mouth with clean water. This helps remove bacteria or foreign particles that could cause infection or irritation.
Step 4: Monitor Your Dog Closely
Keep a journal of symptoms, feeding, drinking, and bowel movements. This can help your vet make a faster diagnosis if problems arise.
Step 5: Call Your Veterinarian
Your vet may recommend:
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A physical exam
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Abdominal X-rays
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Blood work
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Deworming treatment
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Anti-nausea or antibiotic medications
Can Iguanas Make Dogs Sick?
Yes, iguanas can make dogs very sick if they are ingested. Iguanas can carry bacteria like Salmonella, along with internal parasites. Their bodies, especially if dead or decomposing, can harbor harmful bacteria that upset your dog’s gut or immune system.
In Florida, there have been reported cases of botulism-like symptoms in dogs who ate iguana carcasses after a cold snap. These cases can cause paralysis and even death if left untreated.
Is It an Emergency If My Dog Eats a Lizard?
It depends on the following factors:
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Size of the lizard: Larger reptiles are more likely to cause blockages.
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Dog size and breed: Smaller dogs are more vulnerable to obstruction or illness.
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Species of lizard: Some are toxic or carry more dangerous bacteria.
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Time since ingestion: Decomposing carcasses are more dangerous than live prey.
When in doubt, treat it as an emergency and contact a vet. It’s always better to err on the side of caution.
How to Prevent Your Dog from Eating Lizards
You can’t watch your dog 24/7, but there are ways to reduce the risk:
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Train with “Leave It” and “Drop It” commands
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Supervise outdoor play, especially near gardens or walls
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Eliminate reptile habitats: Keep your yard clean, seal wall cracks, and trim shrubs
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Use a basket muzzle during walks in lizard-heavy areas
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Install motion-detection sprinklers to scare off lizards from common play areas
When to See a Veterinarian
You should call or visit your veterinarian immediately if:
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Your dog is a puppy, senior, or immune-compromised
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The lizard was exotic or large
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Your dog is showing symptoms of illness
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Your dog has eaten a dead or decomposing reptile
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You’re unsure of what species your dog ingested
Waiting can make treatment more difficult. Many issues—such as obstructions or infections—are much easier to treat when detected early.
Related Articles on Pet Safety
FAQs
Are Florida iguanas toxic to dogs?
Although not venomous, large or decaying iguanas can cause serious illness due to bacteria or toxins released after death.
Should I induce vomiting if my dog ate a lizard?
No. Always consult your veterinarian first. Inducing vomiting without professional guidance can be harmful.
Can lizards carry parasites that infect dogs?
Yes. Many lizards host intestinal parasites that can infect dogs and lead to digestive or health issues.
Is it safe if my dog only bit the lizard but didn’t swallow it?
Even bites can expose your dog to bacteria. Monitor your dog closely and consult your vet if symptoms appear.
