Nature's Match Start to Finish Pig Feed for Rats?

We are upping our rat breeding and I came across Nature's Match Start to Finish Pig Feed (un-medicated) by Purina at the Big R store (50lbs for $16) and was wondering if anyone else has used it. I bought two bags to try.

Nutrition Info - http://swine.purinamills.com/OurProd...CMD008306.aspx

what about copper sulfate there's more i would be worried about i was thinking of useing pig feed but was told the copper was bad for the rats and your snakes could u post a pic of the pellits

I contacted purina about a week ago asking how much was in the feed and never got a reply. :(

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