A:
They should neither pay Zakatul-Fitr on their behalf nor give them any part of it. Moreover, if they give these servants part of it, it will be invalid as payment of Zakah (obligatory charity). However, they may be given charity that is not obligatory Zakah. Furthermore, it should be noted that it is obligatory to replace them with Muslim servants, for the Prophet (peace be upon him) recommended that non-Muslims be driven out of the Arabian Peninsula. In this regard, he said:
Two religions should not exist together in the peninsula of the Arabs.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.