"The homes are unusually noisy. The fowls, their legs tied, cluck and crow at the top of their voices. It generally happens, too, that a rooster gets excited and begins to run and fly all over the house, despite his bound feet, and there follows a long struggle to subdue him.
First the fowl is held in the hand and everyone read selections from certain Psalms, beginning with the words, "Sons of Adam". Then the fowl is circled above the head nine times, the following being recited at the same time: "This is instead of me, this is an offering on my account, this is in expiation for me, this rooster, or hen, shall go to his, or her, death and may I enter a long and healthy life.
The greatest ado is in the yard of the shochet, the ritual slaughterer, where the Kaparos are taken to be slaughtered after the above ceremony has taken place. Only the poorer Jews carry there Kaparos to the shochet, however. The well-to-do have the shochet call at their home and dispatch the fowls there. For there should be no time lost between the Kaparos ceremony and the slaughtering of the fowl."
(Hayyim Schauss, The Jewish Festivals, p.150)
Hard though it may be for us to believe, this ritual, described here by Hayyim Schauss, is a Jewish ritual for Yom Kippur. The Kaparot ritual originated in Babylonia in the tenth century and was particularly popular in Eastern Europe in the late middle ages and, although frowned upon by Progressive Jews and many Orthodox Jews too, it is still practiced today in certain communities.