Feed Bernese Mountain Dog puppies 3 to 6 months old 3 meals daily. 

Feed puppies six months to 1 year 2 meals daily.

Many times adult Bernese Mountain Dogs do better with 2 lighter meals a day.

A quality food is preferred, air dried kibble with with minimal fillers is a great option. You can also look into raw feeding or cooking your dogs meals if their tummy is sensitive.

Chat to your breeder when adopting a puppy to follow through with similar meals when arriving home with you.

Always transition foods slowly when changing things up.