Labs are an active breed. Generally, these dogs are allergic or sensitive to some foods. Details of these foods are given below:
10 Foods Not To Feed Your Dog
https://www.aspca.org/pet-care/virtual-pet-behaviorist/dog-behavior/foods-are-hazardous-dogs
There are many factors you must keep in mind while choosing puppy food for your Lab. You can also check the sensitivity of your dog towards different foods. For this, you can give new food to your dog in small quantity and check its reaction. If dog showing some digestive problem such as diarrhea, constipation etc.; discontinue the food and try this procedure with another food item.
