[SWHouston]

WOW !,

I feel so lucky, living in an area which many of those "dangers" do not
exist. I have a very (tightly) closed back yard, with a 6 ft fence, and
do the insecticides which take care of that problem. Though I have
seen a "predator" type Bird (Hawk I think), there are none which I think
could pick up one of mine (no Teacups).
As in all instances, one need decide if having a Door applies to their
individual circumstances.
Remember, that most all Doggie Doors have an "Insert" which locks them,
and intruders out. Some may think that having this "elective" access
still would be worth installing one. Even with my quite secure location.
I don't leave mine open all the time, and close it when we go to bed.
So, I suppose that even in my situation, their "outside" activities are
monitored.