I could see on this trailer all sorts of openings they could get in. I was able to see all the lines that run under the floor are not sealed, water, drain, gas. Big holes with no foam sealing. I looked down through the floor where the Aux gas line comes in and could see light. I saw a place where the bottom trim of the trailer would allow a rodent could get under the trailer to the drain lines and into the camper. I feel that at least they didn't have to chew their way in, they had an "open door". Also nothing seems to be damaged other than the rugs. I have set a trap an haven't caught anything...yet. Glad the sofa and beds are untouched!