Question 32) - What is the ruling of a man's or animal?s (sur) [leftover food or drink]?

A: The leftovers of every human are pure, male or female, junubi (one who is need of ghusl, menstruating, Muslim or Kafir. Similarly the leftovers of an animal whose flesh can be eaten are pure. The leftovers of dogs, pigs, and hunting animals are impure. The leftovers of cats, free chickens, hunting birds like falcons and hawks are Makruh (detested), as are the leftovers of animals which live in the home like rats and snakes.

~ al-Quduri ~