This might be "old news", but the last time I heard of it was that all cloned animals don't live long because the fact they were cloned from older cells rather than new born cells. I remember that Dolly sheep died of age 6 while this species's natural life span is 11~12 years. I just looked it up, they claimed "Dolly was the only lamb that survived to adulthood from 277 attempts". It was proven the same in many other cloning cases, all cloned animals were dead earlier than they should.
I would also be worried about the fact the cell was collected from a dog died of cancer. Cancer is known for having "family history", it is in the DNA. Some families have more risk of cancer than the other. If you collect the cells from someone who already has cancer, the risk of the cloned copy catching cancer is far greater than just another family member catching cancer in a family with cancer history.
So no, if it is up to me I will not clone any animals until the technology can be matured and proven there is no downside of it.
