Question: Meat companies slaughter a large number of chickens at one time [that is, simultaneously]. Now if the person running the slaughtering machine is a Muslim, who says takbír and says the name of Allãh only once at the time of slaughtering all the chicken [simultaneously], is it permissible for us to eat those chickens? If we have doubt about these chickens being halãl, can we [ignore that doubt and] eat them and consider them pure (tãhir)?
Answer: If he repeats the name of Allãh as long as the machine is continuing to slaughter, it is sufficient. In the event of doubt about its being halãl (a doubt which arises concerning the mentioning of the name of Allãh), it can be considered pure and be consumed.