Bats, rats, & cats.

The faith of Abraham is foundational to all believers but righteousness is by faith not works. The works (and restrictions) of the law came many generations later at Mt. Sinai. From God's covenant with man, given to Noah, until the law was given to Moses, pork was a convenient and abundant source of protein. More likely than not, Abraham's table included pork but his FAITH was counted unto him for righteousness.