Was it refrigerated?
How long has it been since she ingested it?
She may have an upset stomach from this - but it isn't toxic. I would have her empty her stomach, though. You can give her 1 teaspoon of hydrogen peroxide by mouth and she should vomit within 30 minutes. If you don't have peroxide you can use one-half teaspoon of table salt. Same effect.
Then just let her rest tonight and feed as usual in the morning.
Veterinarian
Full time practicing companion animal veterinarian.