Are there indoor motion detectors that do not respond to animals?

The control with BM is already the right way. Why complicate it further? If you have LED lamps, the power consumption in the hallway for those few minutes a day is negligible.

Yes, but it is annoying at night when the light in the hallway comes on. Our bedroom door has to be left slightly open so the cats can go out and in.

And with us, it is such that I never know if one of the children is wandering around upstairs unlawfully or the cats.

Yes, but it's annoying at night when the light in the hallway turns on. Our bedroom door has to be left slightly open so that the cats can go in and out.

It's the same with us. 1. because of the child and 2. because of the cat (woe betide if a door is closed)

I’m telling you, integrate powerful pattern recognition :p

Presence or motion detectors can be adjusted. Simply reduce the sensitivity until the animal is no longer detected.

There are various ways to tackle the "problem." It starts with the sensitivity just mentioned. It ranges from small animal suppression to the use of different lens shapes.

Furthermore, of course, detection of whether someone is sleeping or not, etc., and naturally also different installation options.

Motion detectors are rather rudimentary and limited in adjustment options and functions. Presence detectors are much more helpful.