Not much you can do at this point! If she did eat one it may pass with no problems. You need to pay attention for the next few weeks for signs that it didn’t pass and is causing problems – such as her refusing to eat; eating and then vomiting within a hour or so; listlessness, etc.
If she shows any signs of being unwell, take her to a vet and have an xray – the vet should be able to see the blockage.
Eaten*
Not much you can do at this point! If she did eat one it may pass with no problems. You need to pay attention for the next few weeks for signs that it didn’t pass and is causing problems – such as her refusing to eat; eating and then vomiting within a hour or so; listlessness, etc.