As the Jews and Moslems are known to make sure they buy slaughtered meat, which has had its blood drained out, not killed by any other methods(commonly sold beef), pertaining to retaining blood.

This commandment comes from the Old Testament, for Christians to only eat animals which’s blood has been let, as blood is to be abstained from. It was actually reiterated in the New Testament after a gathering of the congregations deciding on what Mosaic laws are to be kept.

Read-

Acts 15:27 We have sent therefore Judas and Silas, who shall also tell you the same things by mouth. 28For it seemed good to the Holy Ghost, and to us, to lay upon you no greater burden than these necessary things; 29that ye abstain from meats offered to idols, and from blood, and from things strangled, and from fornication: from which if ye keep yourselves, ye shall do well. Fare ye well.

Please start looking for “Kosher (U)/Halal(H)” meat till you establish a code too, “C” meat, Bloodless meat, which is ensured dead by blood letting, and not strangled etc, with blood retained.