Ruling on joining sheep with goats for the purpose of paying Zakah

A: The Nisab of sheep is forty on which there would be only one sheep to be given as their Zakah even if they are a mixture of sheep and goats until they reach 121 in number which will increase the given number to two sheep according to the Ijma` (consensus of scholars).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.