I would do the whole foods thing and cut down on foods like dairy but not yoghurt, so instead of milk you can have rice milk, etc. When I was breastfeeding I had to go on an elimination diet because my DD was allergic to some foods. I did all unprocessed foods and alternated. Most detoxes are similar to a very healthy diet with limited protein and no dairy and no wheat or lower fibre carbs. I think as long as you don't limit the protein (you both need it right now!) and cut back on dairy and wheat based foods, you should be fine. I agree with following the 1Million Kilo Challange first week diet, it was designed to be a mini detox for those dieting, a basic one. Just increase your calories by adding snacks to that week from the snack list! You need more calories a day, but they need to be good calories in order to be detox foods