One answer: both cat and chicken are from the same species. Maybe this is the start of alien invasion! Maybe the same species dressed as cat and chicken and they are communicating each other through some sort of "something" that there's this wonderful lady who adopts them. Maybe they are trying to build up their "nest" in the basement of your mother-in-law's house! Ah I knew this would happen! Clever aliens!
Jokes apart, great story
