Company email (May 2014):
"In our mainstay beers (Windvane, Ominous, Migration and Firefly Rye) we do not use any animal products/by-products. Our filter media is perlite, which is created by cracking volcanic glass.
I cannot guarantee that special one off releases wont contain things like honey or lactose, but you should be safe with the aforementioned beers."
Bad Weather Firefly Rye
Vegan
This product is listed as vegan friendly.
What the company told us
Correspondence on record, with the date of each entry.