what motivates?

One child went for buying chicken for the pets. We both observed the shopkeeper cutting and cleaning the chicken. On the way back he shared “I wonder what motivates the shopkeeper to be in this business, is it money or what?

I also want to ask the shopkeeper “how does he feels in this business?, does he feels the same as I feel – does he feels that this is cruelty? OR it is just my own definition of cruelty?