hmmm. I would find out exactly what is meant by homemade jerky? is there seasoning involved? Some people just dehydrate plain meat and call it jerky. You might want to talk to Grandmother and find out so you are ready for the vet (it will also give you a way to kindly let her know tummy is upset)
Tummies make noise and when trying to digest, I have had this happen to me when I eat beef
A trip or talk with the vet will probably make you feel better and may help her too.
try some low sodium chicken broth, then add a little rice or baby rice cereal.