Cat 🐈🥗 (D.Burch) 
Miakoda 
Umm... according to experts, sleeping with the door closed is how you avoid dying in a fire.
I have a cat door for my bedroom though.
Micah
Dr. Amy, Psy.D.@m @hellomiakoda @catsalad @VVitchy How hard are these to install? I bought a few but the Task feels overwhelming lol
It was a pain. Some tips -
If you take the time to be careful, you can skip taking the door down if it's just a hollow core door.
I think the square ones are easier.
Avoid ones that cut the edge of the door on hollow doors!
Measure. Stick the frame of the cat door on the door. Trace the inner hole, and the outer border of the cat door frame.
Make sure all of your measured cut is going to be inside the car door frames edges, but bigger than the inner trace.
Drill at the 4 corners (you want all of the drill hole inside the measured part, right on the edge of the corner), going all the way through the hollow door.
But when cutting, just do one layer at a time. Trying to cut both layers of a hollow door in one shot will make it a pain.
Also, the inside is cardboard comb. It's easier to utility knife that part.