Like others have mentioned, that is just plain STUPID to get your daughters belly button peirced at age 4. What good will it do? Theres really no point, just putting a hole through your baby's flesh for no reason. You should wait until she is older, when she may want it. Ugh... people these days!!
But if you really are INSISTING on jabbing a needle through her belly button, i suggest you talk to a doctor first about the anti biotics. Haha, i think you should take a camera along, and snap a pic of the doctors AND peircers PRICELESS FACES when you tell them you want your FOUR YEAR OLDS BELLY BUTTON PEIRCED.
How sad, this is even coming from a teenager.
Just to let you know now, unless the peircer just wants money and doesnt care, he is most likely not going to peirce her belly button because she is very short and is not nearly done growing into her adult height, which as she grows, would cause the peircing hole to stretch and become ruined.
(Knowing from experience because i went to get it done when i was 12 and was pretty short then).
I truly hope you meant she is 14, and forgot the 1....