Three cats, well actually two that patrol the backyard (where I park) and catch on average one rodent each per day. And every morning I watch at least a dozen play in the front yard. I open my hood and check my air intake and look for other signs of rodents before I crank up (every time). So far the only problem I have had was one of the cats used my hood for his lookout perch. I discussed the situation with him and turned Miss Big Booty around. Now he uses a tire in the bed as his perch and I have seen him catch a chipmunk from that tire.