The Torah in Exodus 12:46 teaches us the prohibition of breaking a bone from the Passover lamb:
בְּבַ֤יִת אֶחָד֙ יֵאָכֵ֔ל לֹא־תוֹצִ֧יא מִן־הַבַּ֛יִת מִן־הַבָּשָׂ֖ר ח֑וּצָה וְעֶ֖צֶם לֹ֥א תִשְׁבְּרוּ־בֽוֹ׃
It shall be eaten in one house; you shall not take any of the flesh outside the house, and you shall not break any of its bones.
Why do we not break the bones of the Passover lamb?
Is it because it was a pagan practice or because of something else?