Bellflower: “What a nightmare! Has that happened to you or anyone you know?”
After they feed, the drop off (it’s actually something like, feed, drop, grow, feed, drop, multiply). If you don’t get ‘em before then, you will have thousands of very tiny ticks all over the place.
I speak from experience, knowing someone who didn’t aggressively treat an inside/outside dog until after the ticks were well fed and had fallen off inside. You would not believe how many can hatch, and they instinctively scatter and hide everywhere, in wall outlets, behind baseboard, etc.
I wage total war on them. No quarter for ticks! Unfortunately, my neighbors don’t appear to care, so my property is always under seige from their untreated pets.
Buy a couple of guinea hens, ticks are a favorite food for them and they will clear your property.