New $2/1 Farmer John Hot Dogs Coupon (FREE at Walmart)! September 4, 2010 This post may contain a link to an affiliate. See my disclosure policy for more information. There’s a new Farmer John’s printable coupon available! Just go here and use zip code 90001 to print a $2/1 Farmer John hot dogs coupon! Some Walmart stores have these priced as low as $1.68, so FREE after the coupon! Thanks, My Frugal Adventures!