Is peanut butter bad for dogs?

ok so i noticed that they make peanut butter dog cookies or there are homemade recipes for dog cookies that contain peanut butter. but since sodium is bad for dogs and peanut butter has 150 mg of sodium would it be bad for them, or is it safe in moderation? .....also anyone know any good dog cookie recipes ?
Update: Thanks, to all of you who don't know were i heard that salt was bad for dogs .......http://www.vetinfo.com/dtoxin.html
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