Be careful with the grapes especially if she is having gagging issues, the little part in the middle that would have seeds if they produced them can be a choking hazard as can the peel. I always peel and pit grapes. The moisture in them is great now though.
I would do a top to bottom hunt everywhere. If she is free range it is very possible she ingested something and it could even be an old nut from one of her stashes. You need to crash the place...