I haven't heard a lot of voices out there telling people that saturated fats from healthy grass fed animals is good for you. (type1solution.com)
The problem is that it is VERY hard to find healthy grass fed meats in typical grocery stores. (truthaboutabs.com)
Go as deep as possible every 30 cm or so, and it will help with drainage and encourage grass root growth for generally more healthy grass. (idealhome.co.uk)