Aye but they still get them which was my point
I also never see evidence of fleas here, do my dogs routinely, but i am very allergic to flea bites. So i know if/when i get them. If i wasn't allergic to the bites i would probably think i never got them either.
All wild animals have fleas, our dogs come into contact with wild animals, or at the very least go into places wild animals are, so they will always be picking up fleas to some degree. Just one dead rabbit in the car, and you can see fleas jumping for days afterwards
All wild birds carry mites, our chickens come into contact in some