Related for Bekhorot 65:34

One must not flay the legs of a slaughtered animal on the holiday. And one must not flay the legs of a slaughtered animal on the working day, if it is a firstborn or a sacred animal that has become unfit acts. You can do anything for circumcision on a holiday necessary to do; Things that one is not allowed to do on the Sabbath, one may also do on the holiday: He may grate cumin and mix wine with oil. Rabban Shimon ben Gamliel says: Only he shall not first tear canvas to rags.