my baby is always hungry, after breastfeeding... everytime he need formula milk after I feed him, why so?

A. hi ..babies usually like to feed for comfort..they r not always hungry.. The following traits indicate that a baby is getting enough milk. The child is pooping 4-5 times a day and the poop is large and mustard coloured. The baby is peeing at least 8-10 times a day. The baby looks content after a feed, though this differs from one child to another. The breasts feel softer and less full after feeding.