In that case, you should have simply said so. The original post was far too vague to know what you actually were asking.
As far as babies in cosplay, honestly I don't think too many people have a problem especially since kids GENERALLY love dressing up though a 1 year old really isn't going to really care much at this stage. That said, if it is obvious that the baby is uncomfortable or doesn't want to be in that costume, it wouldn't be right to force them into that costume. Also, as a one year old, she is likely still in diapers so you need to take that into account and be able to access that quickly without hassle.