Ruling 2649

If a kid [i.e. a baby goat] suckles milk from a pig to the extent that the milk strengthens its flesh and bones, the kid and its offspring become unlawful to eat and their milk becomes unlawful to drink. In case a kid suckles milk to a lesser extent, then based on obligatory precaution, it must undergo a process of istibrāʾand after that it becomes lawful to eat. The process of istibrāʾ for a kid is that it must suckle pure milk for seven days. If it does not need milk, it must eat grass for seven days. Based on obligatory precaution, a suckling calf, lamb, and the young of other animals whose meat is lawful to eat fall under the same rule (ḥukm) as a kid. It is unlawful to eat the meat of an excrement-eating animal, but in the event that it undergoes the process of istibrāʾ, it becomes lawful to eat. The process of istibrāʾ for such animals was explained in Ruling 219.