Hi Meg
This isn't a particularly unusual thing to happen, and most of the time it will either pass through, or the dog will vomit it up - and you obviously need to do a thorough poo 'inspection'

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I don't want to worry you, however, please do keep an eye on her. If at any time she tries to vomit but can't, becomes lethargic and doesn't seem herself please take her to the vets, because they can get lodged and cause an obstruction and this can be life threatening.
As I said, don't panic, most of the time they eventually come out from one end or the other, but do keep an eye on her until such time as it reappears
HTH
