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What causes sudden, unexpected death in a seemingly healthy dog?

Updated On September 23rd, 2025

Pet's info: Dog | Cocker Spaniel | Female | 6 years and 10 months old | 45 lbs

Unfortunately my dog died yesterday all of a sudden. She was a 7 year cocker spaniel and a bit overweight. She was not eating properly for 2 days but she was very active and healthy. She played with me for 2 hours before the day she died. The next afternoon I went near her to give lunch. She was there lying down no breathing and foam running out of her nose. I touchee her and she was so stiff like a stick. She died all of a sudden without a symptom. Please let me know the reason for her death.

2 Answers

Most Helpful Answer

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Answered By Linda G, MS, DVM

Veterinarian

Published on November 14th, 2019

Hello. I am so sorry for your loss. I am so sad for you. Without a complete medical history, it is impossible to determine causation, but sudden death can be brought on by heart failure, drug or toxin ingestion, electrocution, a ruptured spleen, blood vessel or undiagnosed tumor, severe anaphylaxis, or some other congenital problem just waiting to happen. A sudden death is always shocking & I can understand your need for answers, but sometimes things just happen & they are totally out of our control. Again, I am so sorry for your loss.

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1Pet Parents found this answer helpful

Other Answers

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    Answered By Angel Alvarado, LVT

    Licensed Veterinary Technician

    Published on August 17th, 2018

    I'm so sorry for your loss. Without a post mortem examination, it can be almost impossible to determine what happened. Possible causes include undiagnosed cardiac or neurological conditions, toxicity or a congenital defect.

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    1Pet Parents found this answer helpful

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