Rawhide is very dangerous for dogs. She needs to see your vet asap:
A processed rawhide can shrink up to half its original size when dried. When rawhide is again wetted, usually when your pet salivates over this chew you have provided, it will slowly regain its original size. When your pet tears off and swallows a piece, that piece then has the potential to swell inside your dog’s stomach. Your dog’s gastric juices WILL NOT break down the rawhide. Once swollen, the piece then has the potential to cause anything from mild to severe gastric upset, to death. Danger Rawhide