Can I feed cerelac for 1month old labrador puppy?

Yes you can. Just lessen the amount. I fed my 2 month old labrador then (now she's 6 months) with Cerelac Chicken and Vegetable flavor. I just put 1 small scoop in her food bowl and a 1/4 cup of water. She was so crazy about it! It only served as a food supplement to her daily diet. She eats a good quality dry dog food though. Your pup will benefit a lot. Mine now is so healthy, big in size, in perfect weight, zero visit to the vet and am looking forward for a maximum growth he could possibly attain. Labradors are still puppies until 1 year. Mature Labradors starts at 18 months actually.