Congratulations on your new pet, i bet he/she keeps you occupied for most of the time.Lab's are voracious eaters, specially at this young age they keep eating a lot. Try to supplement your puppy with milk(boiled),bread,cerelac,chi cken Stu,mashed chicken, boiled vegetables, may be some dog food for some change.I made a menu for my puppy, will be glad to share it with you.
Breakfast-Milk and small bite sizes of bread.
Lunch-Mashed boiled rice,carrot,spinach and chicken(all cooked together).. try to give it a semi solid feel so that he can pick it up with his tongue(No salt)
Evening snacks-Cut small square pieces of bread toast them on a pan and make them crisp or else give a small cup of cerelac.
Dinner-Serve dinner a lil early.You can serve him the same that you did for lunch, else mix some mashed rice with milk or celerac will also do.
Have fun :)