(1) If the bird is slaughtered in a non-zabiha way (factory), would it be haram to apply the bird fat to the body (only externally)?
(2) If it is halal to apply non-zabiha animal fat to the body, would it nullify the wudhu to apply externally, i.e. it is considered najis?
(3) If the bird is slaughtered in a zabiha way, would it be haram then to apply its fat to the body (externally)?
(4) If it is halal to apply a zabiha bird fat then would it nullify the wudhu to apply externally i.e., is it najis?
بسم الله الرحمن الرحيم
Animals and birds that don’t prey with their canine teeth and claws and generally their diet is halal and pure then those animals and birds are halal. So it is mentioned in Fiqh books. And since neither I have seen emu bird nor know its details so if the emu bird seems to be halal as per the definition mentioned above then it shall be halal after slaughtering on Shariah method and the oil prepared from its fat will be halal and pure. So it shall be lawful to apply it on the body etc. and if it is slaughtered on non-Shariah method then halal bird will become haram due to slaughtering on haram method. Thus in this case the oil prepared with the fat will not be halal and pure and subsequently its use will not be lawful i.e. it will be impure.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.