9. Confining of the Nejasat eating animal (Istibra)
The dung and urine of an animal which is habituated to eating human excrement, is Najis;
and it could be made Pak by subjecting it to Istibra; that is, it should be prevented from
eating Nejasat, and Pak food should be given to it, till such time that it may no more be
considered an animal which eats Nejasat. The following animals should be prevented from
eating Nejasat for the period specified: Camel for 40 days, cow for 20 days, goat/sheep
for 10 days, water-fowl for 5 days, domestic hen for 3 days.