For God so Loved the world, that He gave His only begotten son, that whosoever believed in Him should not perish, but have everlasting life.
Well it has been 2023 years, and not one more sacrifice of animals.
In the Old Testament we read of the sacrifices, that the people were commanded by God to make.
Leviticus 1 describes the burnt offering, which turned God’s wrath away from the people. Three kinds of animals were offered as burnt offerings — bulls (vv. 1–5), sheep and goats (v. 10), or turtledoves and pigeons (v. 14).
There were two mandatory sacrifices in the Old Testament Law. The first was the sin offering. The purpose of the sin offering was to atone for sin and cleanse from defilement. There were five possible elements of a sin sacrifice—a young bull, a male goat, a female goat, a dove, pigeon or 1/10 ephah of fine flower.
The second was in Leviticus 5:15 “If someone acts unfaithfully and sins unintentionally against any of the LORD’s holy things, he must bring his guilt offering to the LORD: an unblemished ram from the flock, of proper value in silver shekels according to the sanctuary shekel; it is a guilt offering.
There was always another animal being born, to replace the one offered. When Jesus came, there was not another, nor ever will be, born to replace Him. He became the perfect burnt offering, the sin offering, and the guilt offering.
Jesus is described as our sin offering in Hebrews 13:10-12.