The fruitage of the spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, and self-control (Galatians 5:22-23). It is impossible to exhibit these fruits while slaughtering an animal, just as it is impossible to drain all the blood out of an animal’s flesh before consuming it (Genesis 9:4).
I recommend reading Dominion vs Tyranny in Genesis and other articles on this website. The message is simple. God is love (1 John 4:8;16). We should be motivated by love in everything we do (1 Corinthians 16:14). Cruelty and love are incompatible.