Probably the wild animals are already being cautious and a bit nervous about leaving their usual haunts for populated areas

 Probably the wild animals are already being cautious and a bit nervous about leaving their usual haunts for populated areas. It is the cats’ and dogs’ territory and the wild ones know that they are interlopers. As to the size difference, more experienced wild animals may not be afraid of cats or dogs, but most don’t want to take on any animal ready to defend its turf. It’s usually not worth the risk of even a small injury when you have no medical care. As to size, most humans will leap out of the way when a rat or other vermin runs at them. Some of us will even run from a big cockroach and they don’t bite!

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