Next line "Some authorities think there never will be." It's still possible they'll get resistant one way or another. The article claims 10% survived. This doe

Next line "Some authorities think there never will be." It's still possible they'll get resistant one way or another. The article claims 10% survived. This doesn't mean they're resistant to the dye/boric acid, it probably just means they never tried the bait. It's possible they'll become resistant to the bait (i.e. the bait won't attract them anymore).