Church father Origen (185-254) in his Exhortation to Martyrdom
attacks animal sacrifices as offerings to demons,
and as a reason for natural disasters caused by God.
 
    "Some do not consider the truth concerning daemons, namely that if they are to remain in this gross air near the earth they need food from sacrifices and so keep where there is always smoke and blood and incense.  Accordingly, they hold it a light and indifferent matter to offer sacrifice.  To this we would say that if those who provide food for thieves and murderers and barbarian enemies of the great king are punished as offenders against society, how much more would they be most justly punished who by sacrificing to the ministers of evil give them food which maintains them in the region near the earth..." Exhortation to Martyrdom, P. 425, Ibid.

Animal Sacrifices Are a Reason for Natural Disasters Caused by God.

(The author in footnote 21 on the above page states: "For sacrifices as the food of daemons, cf. my note on Origen, contra Celsum, III, 28; for the view that they cause earthly disasters such as famine, drought, flood, and earthquake, cf. contra Celsum, VIII, 31.")