Our vet recommend neutering around 6mths of age, there is no need to worry if your dog is older, we've spayed dogs of 4 - 8yrs old, but we highly recommend blood tests to see if they are ok for the anathetic.

I think neutering is the best way to go, if you dont want to breed your dog. Not only does it prevent un wanted pups, but also a uterus infection, which can be deadly, and testicular cancer in the males.... and i also read that studies show that neutred dogs/cats live longer (not sure if that is true though!!!)