I'd love to see an alert of some kind for hunting lionesses when you go to nest them. I don't know how many times I've gone to nest a female to find that she's hunting. It's not a huge big deal if you have Nesting Materials or and Abandoned Nest for her and it's just a mater of a click or two to get her nested, but I get so irritated when I have to go through, counting up uses of feathers and whatnot to build a nest for a lioness, only to find she's out hunting and can't nest.

It could be as simple as a different font type (italicized, bolded, etc.) or an asterisks. It doesn't need to be any sort of elaborate thing.