This is a good movie. If you like sled dog racing, then you should watch it. But if you are an emotional person that can't stand looking at hurt animals, then you shouldn't watch it.
Do watch it with the kids to begin with our 5yo found the father dying quite hard to take but took to the rest of the movie well, our 8yo didn't like the dog fight and was upset about it - asked questions about why someone would put their own anima,l that they loved, in danger to hurt another ... a very 'american dream' type film though!!
The "family values" in this film are deliverd with a heavy hand. Which is a GOOD thing, when young children watch movies they don't always get the nuances so I say go ahead make it painfully obvious what is good and what is evil. My 5 year old was able to grasp almost all of it. Even asked questions about why some people are bad.
Watch this with your children if they are sensitive. It will be worth your time.