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My Dog Ate Green Tomatoes: What to Do and Signs to Watch For

PawAI Lab
7 min read

Learn why green tomatoes and tomato plant parts may pose a toxicity risk to dogs, what signs of solanine and tomatine exposure to watch for, and the steps a veterinarian may recommend after ingestion.

Quick Answer

Green tomatoes, along with the leaves and stems of the tomato plant, contain glycoalkaloids called solanine and tomatine that can be toxic to dogs. Ripe red tomatoes contain only trace amounts and are generally considered non-toxic. If your dog ate green tomatoes or tomato plant parts, contact a veterinarian or an animal poison-control service right away, especially if vomiting, diarrhea, weakness, or confusion develops.

Before using any tool, contact a veterinary professional if your dog may have eaten green tomatoes or tomato plant parts.

  • US: ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661)
  • UK: Animal PoisonLine (01202 509000) or your nearest veterinary emergency clinic
  • Canada: ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661)
  • AU: Animal Emergency Centre or your regular vet
  • EU: Contact your nearest veterinary emergency service

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Safety Verdict

Potentially Harmful. Green (unripe) tomatoes and the leaves, stems, and vines of the tomato plant contain higher concentrations of the glycoalkaloids solanine and tomatine. These compounds can affect the gastrointestinal tract and the nervous system in dogs. Fully ripe red tomatoes contain only very small amounts of these substances and are generally considered non-toxic when fed in moderation.

The risk associated with green tomatoes depends on the amount ingested and which parts of the plant were consumed. The leaves and stems tend to contain the highest concentrations, followed by green fruit. Because the exact toxic threshold varies and is not precisely established for dogs, any significant ingestion of green tomatoes or tomato plant parts warrants professional assessment.

What Should the Owner Do Now?

  1. Contact a veterinarian or animal poison-control service. Have the details of what and how much was eaten ready so the team can assess the level of concern.
  2. Do not induce vomiting unless a veterinarian or poison-control professional directly instructs you to do so. Improper home induction can cause additional harm.
  3. Remove any remaining green tomatoes or plant parts from your dog's reach to prevent further ingestion.
  4. Do not give food, milk, salt, oil, charcoal, or any home remedy. These are not proven treatments for solanine or tomatine exposure and may complicate the situation.
  5. Monitor your dog closely for changes in behavior, digestion, or coordination while you await professional guidance.
  6. Follow the veterinarian's instructions regarding whether an examination, supportive care, or monitoring at home is appropriate.

What Signs May Occur?

Signs of green tomato toxicity in dogs may develop within a few hours of ingestion. Not all dogs will show every sign, and the severity can vary based on the amount consumed. The absence of early signs does not necessarily rule out risk.

Gastrointestinal signs may include:

  • Vomiting
  • Diarrhea
  • Drooling or excessive salivation
  • Reduced appetite
  • Abdominal discomfort

Neurological signs, which may indicate a more significant exposure, can include:

  • Weakness or reluctance to move
  • Confusion or disorientation
  • Dilated pupils
  • Loss of coordination or unsteady gait
  • Lethargy

In more serious cases, exposure to higher amounts of solanine and tomatine may be associated with slowed heart rate and breathing changes. If any neurological signs appear, treat the situation as urgent and seek veterinary care promptly.

What Information Should Be Ready?

When you contact a veterinarian or poison-control service, having the following details available can help them assess the situation more efficiently:

  • Dog's details: species, breed, approximate age, and body weight
  • Item consumed: green tomatoes, tomato leaves, stems, or vines (or a combination)
  • Estimated amount: best guess of how many green tomatoes or how much plant material was ingested
  • Time of ingestion: when the exposure occurred, or the window of time during which it may have happened
  • Current symptoms: any vomiting, diarrhea, weakness, confusion, dilated pupils, or coordination changes
  • Ripeness: whether the tomatoes were fully green or partially ripened
  • Medical history: any pre-existing conditions, current medications, or prior sensitivities

Provide honest estimates rather than precise numbers. The veterinary team can work with approximate information to determine the best course of action.

Differences That May Affect Risk

Green tomato toxicity risk in dogs is influenced by several factors, and none of them allow for a reliable prediction of outcome:

  • Part of the plant: Leaves and stems generally contain higher concentrations of solanine and tomatine than the fruit itself. Green fruit contains more than ripe fruit.
  • Amount ingested: Larger ingestions are more likely to produce noticeable signs, but individual sensitivity also plays a role.
  • Body size: Smaller dogs may be more affected by a given amount, though toxicity has been documented across various sizes.
  • Individual sensitivity: Dogs may respond differently to similar amounts, and prior gastrointestinal or neurological conditions may increase vulnerability.
  • Ripeness of fruit: Ripe red tomatoes are generally considered safe in small amounts, while green tomatoes carry a higher concentration of the compounds of concern.

Because of these uncertainties, any known or suspected ingestion of green tomatoes or tomato plant parts should be discussed with a veterinarian.

When to Contact a Veterinarian

Contact a veterinarian or animal poison-control service if your dog has eaten green tomatoes or tomato plant parts, particularly if any signs develop.

Emergency signs that require urgent veterinary attention include:

  • Persistent vomiting or diarrhea
  • Weakness, collapse, or severe lethargy
  • Confusion, disorientation, or loss of coordination
  • Dilated pupils or unusual eye changes
  • Changes in breathing or heart rate

Non-urgent follow-up: If a small amount was eaten and your dog appears normal, professional guidance is still recommended to confirm whether monitoring at home is appropriate or whether an examination is advisable.

FAQ

Are ripe red tomatoes safe for dogs?

Ripe red tomatoes contain only trace amounts of solanine and tomatine and are generally considered non-toxic to dogs when fed in small amounts. They should always be given plain, without seasonings, oils, or sauces that may be harmful.

How much green tomato is toxic to a dog?

There is no precisely established toxic dose of solanine or tomatine for dogs. Risk depends on the amount ingested, the part of the plant, and individual sensitivity. Any significant ingestion of green tomatoes or tomato plant parts should be discussed with a veterinarian.

Can green tomato poisoning in dogs be treated?

With prompt veterinary care, supportive treatment is often effective. A veterinarian may provide fluids, manage gastrointestinal signs, and monitor neurological status. Outcomes are generally better when care begins early, before severe signs develop.

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Disclaimer

This article and the PawAI Toxicity Checker provide general safety information and cannot determine an individual pet's toxicity risk or replace a veterinarian or animal poison-control service. If exposure may have occurred, contact an appropriate professional promptly, even if your pet appears well.

Written by PawAI Lab