OH goodness
! At least it was milk chocolate, it's the dark stuff that's really dangerous.
I'd watch her for refusing to eat/vomiting. If she swallowed some of that foil and it wasn't chewed well, it could get stuck in her intestines. Not trying to scare you, just a heads up.
I hope she'll be just fine. I'd think that if she's been fine all day, she's probably just a sleepy girl.
Hugs!!!
Tracy and Luna