Advice on brooder size/options vs. chick age

[JBarnhart]

My bathroom is tiny, I don't think I could have the chicks in there, even though I agree it would be the easiest place to clean Laundry is in the garage so that feels unsafe.

We have both black bears and grizzly (and foxes, wolves, mink/marten, cougar, eagles...). We manage attractants as much as we can so that bears are not a problem, but several neighbours had their flocks eaten/killed a few years back, so predators are a known risk.

I just have to say that I feel much better only having raccoons & coyotes to worry about.
You have, not only bears but GRIZZLIES??? I felt a pang of anxiety just reading that. Lol