Humans have a fraught relationship with beasts. They are our companions and our chattel our family members and our laborers our household pets and our household pests. We love them and cage them admire them and abuse them. And of course we cook and eat them.
I love learning about different dialects and I own all sorts of regional and time-period slang dictionaries. I often browse through relevant ones while writing a story. I also read a lot of diaries and oral histories.