My brother and her wife just recently got married and have their newborn baby.  I really don't like the way they treat their baby.  They rarely have time for their baby and even when they go out to work, I rarely see them bid goodbye to their baby.  Every baby needs to feel that motherly/fatherly presence and if they can't afford to give that time.

I agree with Nazreen, and I think it's mportant to keep in mind that not all parent-child relationships are the same, but it doesn't make one better than the other.

My friend's niece just had a baby and my friend told her that she was concerned because she didn't see them bonding.  This of course, broke her nieces heart because she had been suffering from insecurities (and probably a little post partum depression), over having a new baby around and being surrounded by all the seasoned moms in the family.  The husband stepped in and told my friend that when she and the other “moms” in the family were around, they all were coddling the baby and the niece really had little time to interact, but at the end of the day, when everyone went home to their own business, the new mom and baby spent a lot of good time together.

If you are really concerned, maybe you need to casually mention it to your brother, but be prepared.  everyone loves differently, and while I may not agree with the way that my brother and sister inlaw bond with their children, I make sure to bond with them in my way, so they experience different kinds of love from different people.