Dog flea (Ctenocephalides canis). The development is similar to a human flea. A dog flea lays eggs several times in a three-month period. Female individuals can deliver about 4000 eggs on its host’s fur, some fall on the floor where men and animals walk. Dogs, wolves and foxes are primary hosts of this parasite, seldom cats, field mice, hedgehogs and rats. It can attack men in huge agglomerations.