When it comes to foods that really work, garlic is as good as it gets. This pungent bulb offers a plethora of health benefits. For starters, studies show that people who consume garlic regularly have lower cholesterol levels. What's less well known is that garlic gets much of its goodness from it's high selenium content, a trace mineral that has been heralded for it's antioxidant and cancer-fighting properties. On the raw diets I have read, poultry seems to be the main meat.
Chicken tends to be cheaper and easier to obtain, plus beef is much fattier and richer.
But as long as you are providing a variety of meats, feeding a lot of beef shouldn't be a problem. It's not uncommon at all for dogs new to the diet to have trouble digesting the new bones. This is purely related to NOT chewing properly or because the body is not used to digesting raw foods. Adding a digestive enzyme during the transitional phase would be most beneficial in cases like this. Of course, if it really does worry you that much, you can always go for giving larger bones or by grinding in the beginning and then maybe work your dog up to eating bones.