Well I guess he's fine. He's eating and pooping okay....haven't seen anything hairy come out though, LOL.
I had him at the vet today for his last set of shots and asked him about it. He said it's about the most natural dog food there is, and was probably pretty nutritionable
I wasn't really worried about the dietary/disease aspect of it, I was more worried about how big it was. I couldn't believe he was able to swallow such a big thing and thought it could cause a blockage. The vet felt around on his stomach though and said everything felt normal. He was more amused than worried, LOL.
Thanks again for the replies!