I never bothered deworming my dogs, other than young pups, there's a lot of conflicting info out there...
I did a lot of digging and perhaps this info can be useful to others.
Here's a good summary of a few approaches.
http://www.wormsandgermsblog.com/201...ogs-how-often/
if you feel like digging around on that blog - go ahead, lots of yaki stuff ;)
I have to say, I am not paranoid about worms and living with dogs. However, I personally knew a guy that almost died and had serious abdominal surgery to remove
http://www.cdc.gov/parasites/echinococcosis/
BTW, if you do decide to deworm, there's lots of options using off label large animal meds for dogs, saves a lot of money, if you're comfortable determining the correct dosage.