Felicide. Is the killing of cats. Also the slaughtering of cats. Sorry I had a spelling error in first answer.
Following is the list of some words containing the suffix cide: avicide, germicide, insecticide, pesticide, fungicide, fratricide, patricide, matricide, sororicide, infanticide, feticide, homicide, regicide, canicide, felicide, mariticide , filicide or prolicide , genocide, femicide, vaticide, amicicide ,uxoricide etc.