How long ago? I would call a vet or pet poison helpline immediately. If it has been recently enough, they might recommend you induce vomiting and guide you through it. Or they might tell you you need to bring her in. If it was a longer time ago, you might need to bring her in.This isn’t something to fool around with. I would call one or the other now.
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This is very worrisome. She really needs a good physical exam by a vet to determine what is going on and get her treated. Could she have gotten into something?