DNA Tribes is correct that siblings can and do have very diverse DNA. Your autosomal DNA is a random subset of your mother's and father's DNA (50% from each parent). Two siblings will not have the same results for the same reason that they do not look exactly the same. They do not get the exact same 50% from each parent. Even identical twins don't have exactly the same DNA (only almost exactly the same).
Calorie and Nutrition information for popular products from Steak n Shake: Per 1 shake - Calories: 380kcal | Fat: 12.00g | Carbs: 63.00g | Protein: 11.00g. Per 1 shake - Calories: 890kcal | Fat: 29.00g | Carbs: 140.00g | Protein: 25.00g. Per 1 shake - Calories: 700kcal | Fat: 23.00g | Carbs: 111.00g | Protein: 18.00g.
There are 570 calories in 1 serving of Chili's Grill & Bar Restaurant Steak Fajitas, without tortillas & condiments. You'd need to walk 149 minutes to burn 570 calories. Visit CalorieKing to see calorie count and nutrient data for all portion sizes.