Liaison office of Grand Ayatullah Sayyid Ali Al Sistani (L.M.H.L) in London, Europe, North and South America.
2609. In certain Traditions, the following have been enumerated as
Makrooh acts while slaughtering the animals:
To slaughter an animal at a place where another animal of its own kind can
see it.
To skin an animal before it has died.
To slaughter an animal on Friday night (i.e. the night preceding Friday),
or on Friday before Zuhr. However, there is no harm in doing so in the case
of necessity.
To slaughter an animal which someone has bred and reared himself.