[Marilize]

I don't know about the cow marrow, but I do know that the bones that the cow stands on (aka his legs) shouldn't be given to any dog. These weight-carrying bones are too dense and could easily cause fractures to your dog's teeth.

The marrow is usually very rich too and causes upset tummies quickly. I'd rather give lean meat and hearts for the meat portion of the diet. Marrow contains way too much fat anyway.

I haven't experienced any problems with my dogs and red meat, but we've been feeding mainly white meats, so I'll have to see how their tummies handle it. It's going to be a whole process to switch them to this diet, but I'm hopeful that it's for the best.