I've been feeding RAW for five years. One of mine won't eat unless it IS frozen - he takes the "no raw on these paws" approach to eating
. Dependent on the pooch, however - if you're feeding a small dog, it's best to thaw the meat/bone to avoid a drop in their core temp. Pups, especially, shouldn't have frozen meat/bones. JMO
The dangerous bones are those that are COOKED. Think of wolves (your fur friend's cousin) in the tundra. If they didn't eat frozen bones, they wouldn't survive 'til Spring!