This freebie from 2010(!) has returned.
You'll need to copy & paste the link below in order to get free Purina IncrediBites dog food.
I find it incredibly cute that Purina thinks my dog will bite, chew, and/or savor these in any way. Instead she'll do her best duck impersonation and swallow it whole as soon as I hand it over.
There are a boatload of Purina printable coupons out right now too, a few of which I've listed below.