Unlike exposure to other toxins, many Agent Orange symptoms tend to take several years to decades to present, and can cause a host of health issues. Initial symptoms tend to include common side effects found with many other illnesses, as well as neurological and psychological problems.
Heavy breathing or panting. Most dogs will pant from time to time because they are stressed or excited, but when dogs pant for no apparent reason and the panting becomes excessive, this can definitely be a sign that a dog is experiencing pain.
But be aware that dogs can also pant as a symptom for something more serious as well. They may excessively pant when under various forms of stress. They can also do so as a symptom of a medical illness, an injury or from heat stroke. Panting can also be symptomatic of fever, congestive heart failure, respiratory disease, infections, anemia, or even heartworms. It can even mean an obstruction in the throat. Check the gums.