Scary stuff! Learn the heimlich... it really does save lives.
On choking and raw food, the most common culprits seem to be chicken or turkey necks, foods small enough to encourage hasty gulping and cyllindrically-shaped to make an effective airway plug. Common preventative measures are to crush the bones internally with a mallet (Mandi's turkey neck had been crushed prior to serving), to serve foods partly frozen in order to encourage slower eating, and holding one end of the food while the chewies commence. Serving ground or chopped foods is the ultimate solution for choking prevention. Though going this route circumvents some of the other perceived benefits of a whole-foods raw diet, in the end, we all have to troubleshoot in the ways that work best for our own pack.
Hugs to old puggles, and here's hoping to never to hear similar stories again.