"It is an animal, common in our world, usually hunted, and their meat is lean and very much edible."

His forehead creases as he explains though, not because he's uncertain of what he's saying, but because he's caught in the midst of disbelief that he's actually explaining something like this, a fact he had simply assumed is common knowledge for all. The strangeness of the fact that different worlds exist occurs to him again and only manages to increase the look of bewilderment on his face.