Owners feed their dogs raw for a variety of reasons. Generally, they have healthier coats, less smell, cleaner teeth, fewer allergies (processed kibble causes allergies in many dogs), and more energy.

Sarasum, a lot of times the bones in raw food can cause constipation in dogs. The bones and calcium make their poop harder. It varies by dog and by the bone content in the food. I'm glad you found a grain-free that works, and I bet he loves the tripe!