We have just started having a problem with our 03 Tundra. Twice in 3 weeks we've had mice get into the dash... not the engine, but actually in the fan in the heater/ac duct. Turn on the ac, hear a thump, take out the fan and out falls a dead mouse. Turn on the ac, hear noises, take out the fan and pull out a mouse nest. Where are these mice getting into the dash?? We are thinking under the cowl louver? Can't think of anywhere else. Anyone else familiar with this?