Does the ruling of the impurity of vomit not apply to the vomit of an animal whose meat is permissible to eat? What is the ruling on the vomit of an animal whose meat is not permissible to eat, as well as that of a dog and a pig?

Human vomit is considered pure, according to the more preponderant opinion, as long as it has not changed from food. It becomes impure if it has changed.

As for the vomit of an animal whose meat is permissible to eat, it is pure absolutely, because it is similar to its pure excretion.

The vomit of an animal whose meat is not permissible to eat is impure if it has changed from food, by analogy with its urine and droppings.

The vomit of a dog and a pig is impure, like the rest of their parts.