Caroline notes (September 2015)
"I called them and even though they were confused by the question - "None of our beers have meat in them". Once explained, they verified that they don't use fish bladders, etc in any of their beers because they don't filter any of their beers."
Big Muddy Beers
Vegan
This product is listed as vegan friendly.
What the company told us
Correspondence on record, with the date of each entry.