Answer:
It doesn't live within a house, nor does it live without. Most will use it when they come in, and again when they go out.
Do you know what you can hold without ever touching it?
I have three hundred cattle, with a single nose cord
There is an ancient invention. Still used in some parts of the world today. That allows people to see through walls.
My first is high, My second damp, My whole a tie, A writer's cramp
People take me on walks and I run and have fun. What am I?