I was thinking about when my kids were little in the 60's and we used to give them oleum pecamorphum which was highly concentrated fish oil. We would give them 5 drops in a dropper directly out of the bottle. The little ones would smack their lips as they loved it! It was a gagging smell. Much worse that the fish oil burp, and even earlier times than that, in the 40's everyone of us kids in the family were lined up at bedtime for a large tablespoon of codliver oil. MMMM. So I say, it AIN'T so bad to have an occasional fish burp.