Cat Chewing on Cardboard Boxes: Causes, Safety, and Triage

TL;DR: Chewing cardboard is typically a normal instinctual behavior, but it becomes a medical concern if your cat ingests pieces and shows signs of a blockage, such as vomiting or lethargy.

Why does my cat bite, shred, or chew on cardboard boxes?

Many cats exhibit this behavior due to natural instincts or environmental factors:

• Natural hunting instincts involving biting and shredding
• Marking territory using scent glands located in their cheeks
• A way to relieve boredom or play
• Pica, a condition where a cat consumes non-food items (if they are actually swallowing the cardboard)

Is it a medical emergency if my cat chews on cardboard?

The urgency level is generally low, but you should monitor for signs of a gastrointestinal blockage:

• Generally, chewing is not an emergency unless large pieces are being ingested
• Ingestion can lead to dangerous blockages in the digestive tract
• Contact a veterinarian immediately if your cat is vomiting, lethargic, or unable to keep food down

How can a photo of the cardboard or my cat help with triage?

Visual aids are essential for a virtual triage assessment to determine the level of risk:

• Photos of the chewed box help determine if pieces are small enough to pass safely or are large and jagged
• Clear photos of your cat’s gums and teeth help rule out dental pain or gingivitis
• Images help confirm if the cat is seeking out crunchy textures to soothe oral discomfort