Where are Hook worms usually found in North America? Can you get them up north? The only dog I've had with worms was my Aaerro, and she was infested with them as a puppy about 8 and a half years ago when she was shipped up from Kansas City, Missouri. Other than that I've been lucky. None of the family dogs have had them.
Where can you get food grade DE, other than ordering it off the 'net? The stuff for pools is poisonous to consume, if I remember right.