Purina Dog Food Coupon 2010
If you sign up on their site Purina will give you a coupon for $2 off any of their new brands of dog food. If it were me I would just use your junk email address and sign up, wham, bam thank you for the $2 savings. If you do not have a junk email you should make one, or just send them to any made up address at mailinator.com then log in, no password required and emails get deleted, perfect for this type of thing.
K here is the link for the coupon Purina dog food coupon for $2 off purina dog food
Like I said if you just put email@example.com you can go to mailinator.com log in with your made up email, get your coupon and be gone, never to get junk mail again. Nifty eh!