labrador retriever cross

Question
i want know roughly how long could my dog live for she will be 5 in DEC 07. is she more prone to cancer than retrievers or has she a less chance of it happening. when does it usually occur. is there anything i can do to prevent it

Answer
The more genetically diverse a dog is, the fewer of all kinds of problems.  Feed a decent dry dog chow and little else, and not too much of it.  Obesity is more common and more dangerous than cancer, and 100% preventable, see http://www.longliveyourdog.com/twoplus/RateYourDog.aspx

Regularly check your dog for lumps and other growths and call them to the attention of your vet.  In many cases, you can leave a slow growing tumor.

Spay her if not already.  That eliminates all chance of many cancers.  

With good care, and no problems, she should live to be 12-15 years old.