Barking Dog Scarecrow for Cats, Camo Tent for Infrared

It might be useful to produce a motion activated in-ground stake dog barking sound audio unit to divert cats from hunting near bird feeders. Maybe it should cost $5 and be solar recharged.

 It might be useful to manufacture camouflaged army tents for individuals that screen out infra-red drone and satellite imaging overhead as well. Getting blasted from a predator in the sky at night can ruin ones whole day.