weeeellll doesn't really look like this forum's going anywhere interesting soo can i ask what has gelatine in it?? and rennet is only in cheese right?
Many products do.
Just look at the back of the thing you eat. There'll be a small table reading 'ingredients.' Just look to see if gelatine is included or not. Gelatine, if it is in something, that something is generally a lolly.