Increase the meal from 3 to 4 times also you need to increases the food quantity

If it is starter give a cup of it for every meal

I too have 2 month old lab pup and I used to feed him 4-5 times a day plus one boiled egg no salt in morning and one at lunch time and lastly puppy charger with card

Give puppy dog food or puppy cerelac to shiro atleast 4 times a day, 50grams per serving should be enough. Do not give puppy food directly, make sure you add warm water, mash it well and give it to your pup in room temperature.