Quote:
   | 
					Originally Posted by Rhetts_mama  But giving the preventative without doing the test is dangerous. A heart worm can come loose and cause a clot in the lungs or brain. The owner and the vet need to be aware of the presence of the worms in order to watch out for this potentially fatal consequence. | 
 
  EXACTLY! The heartworms could be present and if that's the case the Owner needs to know about it and the vet as well. If you give a preventative without knowing there are heartworms present the pet will continue to be active and this could cause one to break away dead and clot an artery or lung. this could kill the pet. heartworms need to be treated very carefully under the watch of the vet. bed rest and limited activity are almost always required even in mild cases. and yes immticide treatments are still used here as well that was what the 600-700 cost i listed was. it's pricy and risky...just use prevention and get those yearly tests...another thing about yearly testing is that some preventative companies will back their products up and if a test comes back positive for heartworms you can get restitution from the preventative company. covers your butt in a rare case that the prevention isn't working.