Flying Dog

Flying Dog is one of the beers I was really curious to look into. They have a great IPA called Raging Bitch.

They do brew with spices, honey, fruit juices, lactose, and oyster. All of these are listed on the label. Their beers are sometimes aged in different casks which are, again, listed on the bottle. They also use champagne yeast for some of their beers. Specifically they use the champagne yeast in certain/one time release beers, but not of their reoccurring bottled beers.
They do occasionally share their facilities with other breweries.

The biggest issues here are that they do make an oyster ale and they share their facilities. Due to this, they do not meet the Star K's guidelines and are NOT recommended.