Can you tell me if I could lose weight just by eating healthy and walking my dog every day?

That could be a good. Start. Recommend that calories burned exceed calories in. Drinking at least 8 8 ounce glasses per day is important for both hydration and weight control. Try to get in whole foods (fiber) as well as 5 servings of vegetables and 4 servings of fruit per day. Physical activity is essential. Aim for at least 30 minutes of aerobic activity at least 5 days per week ; don’t forget weight training.