I just watched the video on the raw feeding. Nice work.

A lot of the feed concepts for humans is not the same as canine's. The beef heart is a nice protein type feed but in a performance animal it should not be the staple for energy. When working a dog the fat content needs to be much higher.

Once a dog acclimates to a change in diet of high fat he will use fat for energy and proteins will be used for recovery. Burning fat for energy is a cooler process for the dogs making more water per calorie burned than protein or carbs. (Krebbs cycle)

http://mushing.com/nutrition-renderi...se-feeding-fat

This is a great article about feeding the canine athlete.

Also go to Sportsvet.com : Feeding the Canine Athlete. Another article on feeding fat and its importance.

EWO