In the United States, there is the freedom of the practice of any and all religions. Besides, the U.S. Supreme Court ruled in favor of the SanterĂan practice of animal sacrifice:
U.S. Supreme Court
CHURCH OF LUKUMI BABALU AYE v. CITY OF HIALEAH, 508 U.S. 520 (1993) 508 U.S.
520
CHURCH OF LUKUMI BABALU AYE, INC. v. CITY OF HIALEAH
CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR
THE ELEVENTH CIRCUIT
No. 91-948
Argued November 4, 1992
Decided June 11, 1993
Source:
FindLaw
http://caselaw.lp.findlaw.com/scripts/getcase.pl?court=US&vol=508&invol=520
In addition, review the following regarding atonement, the shedding of animal blood, repentance, sacrifices, burnt offerings, et cetera:
Leviticus 17
Hebrews 9:22
Isaiah 1:11-18
Blessed Be to All!