I would look for any changes in Buffy's behavior, especially in bowel movements and eating and drinking habits. Since she didn't choke, the rawhide will probably be broken down and digested.
I do not give rawhide or pigs ears not only because they are a choking hazard, but because they pose a risk of bacterial infection such as Salmonella infantis which can cause flu-like symptoms (e.g., nausea, vomiting, abdominal pain and diarrhea).
My babies love BullySticks. I think they are a hoot!!! Penis treats -- like they aren't doing the cows (or bulls for that matter) any good. Here is info about BullySticks from
http://www.bullysticks.com 
Bully Sticks are 100% Bull penises, Not a tendon, and not processed meat strips. Bully Sticks are dried, lightly smoked or natural flavor and delivered to your door. We never try to hide what they are by giving them little cute names.