Yes we can do it as like I did in below example both the $(document).ready will get called, first come first served. In below code you will be cleared.
$(document).ready(function(){
$("#page-title").html("Document-ready was called!");
});
$(document).ready(function(){
$("#page-title").html("Document-ready 2 was called!");
});
Output: Document-ready 2 was called!
So in short we can add more than one 'document.ready' function in a page, but for a good programmer it is not advisable.