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Is Mockernut Hickory toxic to cats?

NO (NON-TOXIC)
Good news, Mockernut Hickory is a cat safe plant! While this plant is non-toxic, it may still irritate your cat's tummy and potentially cause vomitting or diarrhea if ingested.
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Additional Names:Squarenut
Scientific Name:Carya tomentosa
Family:Juglandaceae
Detailed Write-up
Author:
Alec
Last Updated:
7/13/25

Is Mockernut Hickory Toxic to Cats?

Introduction

Many cat owners love to adorn their homes with plants and trees to create a natural atmosphere. However, as much as plants contribute to creating a beautiful home, not all of them are safe for pets. Some plants may have toxic compounds that can cause harm to pets if ingested. Mockernut hickory is a popular tree species native to the eastern United States. This article aims to examine whether mockernut hickory is toxic to cats.

Overview of Mockernut Hickory

Mockernut hickory, scientifically known as Carya tomentosa, is a deciduous tree species that belongs to the Juglandaceae family, which includes walnut and pecan trees. It is a tall tree that can grow up to 40 meters in height and have a trunk diameter of up to 140 centimeters. The tree produces edible nuts, which are a good source of food for wildlife, including squirrels, deer, and birds. Mockernut hickory thrives in well-drained soils and is a staple tree species in the eastern United States. It is a long-lived tree that can live for several decades, and its durable wood is commonly used in making furniture, flooring, and tool handles, among other items. The tree's bark and leaves also have medicinal properties and have been traditionally used to treat ailments, including arthritis, toothaches, and diarrhea.

Potential Toxicity for Cats

Although mockernut hickory's fruit and wood are not toxic to cats, the tree's foliage contains juglone, a toxic compound that is also present in walnut trees. When ingested, juglone can cause gastrointestinal problems, including vomiting and diarrhea. In severe cases, it can lead to liver damage or even death. Juglone is a natural defense mechanism that helps the tree fend off herbivores and compete with other plant species. In addition to cats, juglone can also be toxic to other animals, including horses, dogs, and cattle.

Symptoms of Ingestion

The symptoms of mockernut hickory toxicity in cats vary depending on the amount of foliage ingested and the cat's size. Some of the common signs of ingestion include:
  • Vomiting
  • Diarrhea
  • Lethargy
  • Loss of appetite
  • Dehydration
  • Tremors
  • Jaundice
If you suspect that your cat has ingested mockernut hickory foliage, it is critical to seek veterinary care immediately, as prompt treatment can make a significant difference.

Preventing Toxicity

The best way to prevent mockernut hickory toxicity in cats is to limit their access to the tree. If you have a mockernut hickory tree in your compound and also own a cat, it is advisable to keep the cat indoors or erect a fence around the tree to keep the cat away. It is also essential to keep an eye on your cat when they are outside, as cats are known to be curious creatures that may venture into areas they should not. Additionally, training your cat to avoid eating plant matter may help protect them from accidental poisoning.

Conclusion

In conclusion, mockernut hickory is a common tree species that is native to the eastern parts of the United States. While the tree's fruit and wood are not toxic to cats, the foliage contains juglone, a toxic compound that can cause gastrointestinal issues and liver damage if ingested. Therefore, it is best to prevent your cat from coming into contact with mockernut hickory trees. In case of accidental ingestion, prompt veterinary care can help minimize adverse effects.
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