Not to scare you, but do keep a close eye on her. This is how my puppies, who have a neurological disorder, presented their symptoms. We were sure she ate something she shouldn't as her symptoms were so similar to poisoning -- so we induced vomiting immediately and nothing came up! Odd? We did get her stomach pumped and again -- nothing showed up! They wanted to keep her, but we didn't let them as it was a 24/7 vet and we could have brought her back had something else happened. So the next day, she's fine!!! YAY! Then again a few weeks later it happened again.... puke and nothing came up. So keep an eye on her, as I find it odd if you induce vomiting right away, and nothing shows up... if she had eaten poison, and it digested, I'd think she'd be sicker. Positive vibes your way!