The mechanic at the garage today noticed that there was evidence that a rodent had likely been living in my car engine compartment. Obviously, I need to get rid of it quickly before it chews some of the wires or does other damage to my car. The mechanic suggested using D-con, but I have two cats which go outside. Both are mousers. I'm afraid that they might ingest a poisoned rodent. That car sits outside. So what do you suggest?