While I am more of a pro-natural-diet keeper myself, I don't see a reason it could not be used as long as it is rotated into a varied and well balanced diet. Since it is not a complete prey item, much like strips of fish I would supplement it with a calcium powder. I would definitely avoid using it as a staple though. But I don't see a problem with it being used, I mean, we feed our garters rodents and I would consider that red meat!