With a weak, racing but erratic heart rate and dangerously low blood pressure, the vet's hunch is the dog is bleeding out but this is not a common occurrence
in young healthy dogs.
Often when a rescue group goes to a shelter, they only look
for young healthy dogs, even though many people are now considering a Senior or Special needs dog when looking to adopt.
Ideally,
a young healthy dog should have a minimum of 20 - 30 minutes of daily aerobic exercise.
A young healthy dog may only need a basic blood panel to check for parasites and organ functions.
It would be unheard of for a veterinarian to pull all the teeth of
a young healthy dog to keep him from chewing up his owner's furniture.
Your dog is older (greater than 7 years)-- older dogs are sometimes less able to cope with the potential dehydration diarrhea can lead to, and older dogs are more prone to serious illnesses than
young healthy dogs.
A young healthy dog needs daily exercise of at least one hour.