I'm not sure an experiment with non-human mammals would give you much either. How would you control how much sleep the subject gets? Only thing I can think of i

I'm not sure an experiment with non-human mammals would give you much either. How would you control how much sleep the subject gets? Only thing I can think of is sedatives to put them to sleep, and stimulants or flashing lights/loud noises to keep them awake. And those all come with fairly significant side effects, to the point that I imagine you'd really just be measuring the effects of those medications on the subjects rather than the sleep. But this isn't my area, and this is based on like 10 minutes of thought, so maybe there are more reliable ways to control sleep with fewer side effects?