Switch to low-calorie dog food for weight loss. Consult a vet for the best formula.  

Feed 2-3 meals per day with exact cup measurements instead of free feeding.

Take Labradors on longer, more frequent walks and play fetch often.

Restrict treats, feed puzzle toys to make them work for food, use a leash indoors.

Have the vet examine for medical causes and prescribe obesity medication if needed.

Stick to the diet, exercise and portion plans consistently without exceptions or cheating.

Expect a slow steady weight loss for Labradors of about 2 pounds per week.