2}very weak not able to work longer will fainted....
Hi Hakim It's possible that the symptoms you mention above indicate a heartworm problem, but there are a whole host of other options too.
The only person who can make an accurate diagnosis as to what is wrong with your dog is a veterinarian, and I strongly recommend that you have your dog examined by a veterinarian just as soon as you can. It sounds as though he's in serious trouble and needs help.
You can find more information on heartworm (including symptoms, treatment and prevention) here.... Heartworm Prevention
Hope this helps and that your dog is doing much better soon.
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