Remember the December when you couldn't get an A+ for love nor money because some "smart display" company cleaned out the entire supply?
Ah! But if you use the Official RPF keyboard and plug the mouse into the keyboard's hub, you only need 1 USB 2 port, leaving the other for any medium speed device you might want to attach.
Not everyone will want to assist you in building a lethal trap. Have you considered using a live trap so that you can avoid killing animals you don't want to kill?