Ruling on Muslim entering into business partnership with Christians and others
Question

                Is it permissible for a Muslim to enter into a partnership with a Christian in order to raise sheep or deal in them or any other kind of business?.
Praise be to Allah.
      With regard to a Muslim entering into a partnership with a 
      Christian or any other non-Muslim in raising livestock or farming or 
      anything else, the basic principle is that it is permissible so long as it 
      does not involve too close a friendship, and it is only cooperation in 
      some kind of wealth such as agriculture, livestock and so on. A number of 
      the scholars said that that is permissible provided that the Muslim 
      himself is in charge of the business, i.e., he himself is in charge of 
      running the venture in agriculture or raising livestock, and the kaafir 
      should not do that, because he is not to be trusted. 

    This is subject to further discussion. If this partnership 
    will lead to too close a friendship or doing that which Allah has forbidden 
    or failing to do that which Allah has enjoined, then this partnership is 
    haraam because of the corruption to which it leads. But if it will not lead 
    to any of those things and the Muslim is the one who is in charge, and he is 
    the one who will take care of it so that he would not be cheated, then there 
    is nothing wrong with that. 

    But whatever the case, it is better to avoid such 
    partnerships and to enter into partnerships with his Muslim brothers rather 
    than others, so that he will keep his religious commitment and his wealth 
    safe, because entering into a partnership with one who is an enemy to him in 
    religious terms poses a danger to his morals, religious commitment and 
    wealth. So it is better for the believer in every situation to keep away 
    from such matters, so as to protect his religious commitment, to protect his 
    honour, to protect his wealth and so as to avoid betrayal by one who is an 
    enemy to him in religious terms, except in cases of necessity when there is 
    a need for that, in which case there is nothing wrong with it, subject to 
    the conditions mentioned above, namely that it should not cause any harm to 
    his religious commitment, honour or wealth and on condition that he should 
    be in charge, because that is safer for him. So the kaafir should not be in 
    charge; rather the Muslim should be in charge of the business or a Muslim 
    should act on his behalf.

    End quote. 

    Shaykh ‘Abd al-‘Azeez ibn Baaz (may Allah have mercy on him)