Ruling on eating chicken that was fed hormones or ground meat
Question

                Does the meat of chicken grown by giving steroids is halal evenif it is slaughtered correctly?
Praise be to Allah.
      If the manufactured food or medicines did not contain 
      anything harmful or impure (najis), there is nothing wrong with eating 
      chickens to whom they were fed, if they have been slaughtered in the 
      proper shar‘i manner by a Muslim or a kitaabi (i.e., Jew or Christian). 

    But if the feed or medicine is harmful to man, and will make 
    him sick, for example, it is haraam to feed them to chickens and to eat 
    those chickens, because Allah says (interpretation of the meaning):

    “and do not throw yourselves into destruction”

    [al-Baqarah 2:195].

    And the Prophet (blessings and peace of Allah be upon him) 
    said: “There should be neither harming not reciprocating harm.” Narrated by 
    Ibn Maajah (2431) and classed as saheeh by al-Albaani in Irwa’ al-Ghaleel 
    (896). 

    If the feed is naajis (impure), such as meat from animals 
    that died without being slaughtered properly (maytah) or blood and so on, 
    that may be put in the feed, then the matter is subject to further 
    discussion. 

    Is most of the feed is made from those impure substances or 
    from taahir (pure) things such as grains and the like? 

    If most of the feed is pure, it is permissible to eat it, and 
    there is nothing wrong with that. 

    But if most of its feed is naajis (impure) -- this is what 
    the scholars call “an animal that feeds on filth” -- it is not permissible 
    to eat unless it has been detained and fed with taahir food that will make 
    its meat good. 

    Shaykh Ibn ‘Uthaymeen said in al-Sharh al-Mumti‘ 
    (11/298): 

    The animal that feeds on filth is one whose food is mostly 
    impure (najaasah). 

    There are two scholarly views concerning this: one view is 
    that it is haraam because it has been nourished by impure matter that has an 
    effect on its meat. 

    The other view is that it is halaal. This is based on the 
    idea that impure things become pure when they undergo a transformation. They 
    said: The impurity that it ate has been transformed into blood, flesh and 
    the like that grows in the body, so it is taahir. End quote. 

    Shaykh al-Islam Ibn Taymiyah said:

    The Prophet (blessings and peace of Allah be upon him) 
    forbade the milk of an animal that feeds on filth or impurity, but if the 
    animal is detained until it becomes pure, then it is halaal according to 
    Muslim consensus, because before that the effect of the impurity could be 
    seen in its milk, eggs and sweat, so it gave off a rotten and evil stench. 
    Once that is removed, it becomes taahir (pure). If the ruling is established 
    for a reason, it ceases to apply once that reason is no longer present. End 
    quote. 

    Majmoo‘ al-Fataawa, 21/618 

    And Allah knows best.