A:
Offering slaughtered animals for the dead with the intention of drawing closer to them is considered a form of major Shirk (associating others with Allah in His Divinity or worship that takes the Muslim out of Islam). If the intention is to celebrate their birthdays without drawing closer to them, this will be a prohibited Bid`ah (innovation in religion) which must be avoided. People must be prohibited from observing such events even if they are used to doing this, so it is not permissible to go on in this practice.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.