long heat

Question
My dog is a black labador retreiver,and a little of some kind of other dog, I believe it is sharpea. She is on her later third week of being in heat and will be in her fourth week in just a couple of days. My dog was fixing to be 9 months old when she went into heat. This is her first time in heat...It has always been known to me that a dog will be in heat for a couple of weeks only. Why? has my dog been in heat so long.

Answer
Sometimes it drags on.  The second and third weeks are when the most risk of accidental breeding is. Don't take this lightly. She will do anything to get loose and get to a male. Once loose, an accidental breeding and an unwanted litter is far from the worst that can happen. Such breedings can also result in fatal infections. She can get killed when she dashes heedlessly across the road in front of a car. Other dogs or coyotes may kill her.

You can expect the same thing about every 6 months for the rest of her life if you don't go ahead and get her spayed. There is no other answer, and no good reason not to. Besides saving the hassles, it reduces the chances of cancer later in life. Please make life easier for yourself, her, and society in general by getting her spayed as soon as a vet will do it.