Nc, focus on the % of nutrients to total calories. If you are increasing calories burned through walking, you are burning other nuts too. Use an app like myfitnesspal to log your meals and set your nut %'s. Your doctor can advise these targets, but for example mine are 60% Protein, 30% fat (good fats), and 10% carbs. I burn about 1200 additional calories from walking but the app takes this into consideration. Don't focus on the grams but stay in the range of your target % intake.
Been an interesting ride thus far.. no complaints from me just trying to feel the difference I am slowly starting to see.. am blessed and thankful. Down 50 pounds since my pre op diet