Babies and water

Guys....I just gotta get this out cause I can't even believe what I was told. And am disgusted.

So apparently my second cousin. Her first baby was a little girl (had her 10 years ago)...I just found out today that the grandmother talked my cousin into replacing one bottle of breastmilk a day with water...to keep her from getting "fat"

WHAT THE F*CK!

The child ended up malnourished and her teeth formed poorly and has some other health issue from it.

Why are people so awful? They literally ruined this poor babies health cause they didn't want her to be "fat"?

Scumbags