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Why does my 1-year-old Boxer suddenly collapse while walking?

Updated On September 23rd, 2025

Pet's info: Dog | Boxer | Male | 50 lbs

What could make my dog fall over walking? My 1yr old boxer did this yesterday. Had 1 dog have same issue 2yrs ago but had cancer and passed. Tests showed nothing. Thank u

1 Answer

Most Helpful Answer

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Answered By Linda G, MS, DVM

Veterinarian

Published on February 26th, 2019

Hello. When you indicate tests showed nothing, were these tests for this dog or the one that passed? I would first consider this to be a possible heart problem because of his breed ( Boxer ) & his age. A possibly interruption in the heart rate could momentarily shut off oxygen to the brain essentially causing Max to pass out for a few moments. If blood work was conducted, & everything was normal, that is great. If listening to his chest indicated no murmurs or arrhythmias , & a chest x-ray showed a normal sized heart, then the next step is either a cardiac ultrasound, or the use of a Holter monitor, also known as an event monitor. Max will wear this monitor for at least one 24 hour period, & possibly more, to see if his heart behaves in any abnormal way to explain his falling over. Once a possible problem is identified, any necessary intervention can be started to prevent future episodes. Please discuss this further with your veterinarian. Thanks for using Petco Pet Education Center, formerly Petcoach.

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