My idea is to have two tick boxes in the hoard that are 'only show hungry lions' and 'only show bored lions'. When you tick them, only lions that are hungry or in need of amusement (the level at which the symbols show up in the den page) will appear in the drop down list for food items and toys. This so that you don't have to scroll through heaps of lions examining each percentage level so you know which ones to play with and feed first. I know you can check on the den page but this would be easier than going back and forth repeatedly. Let me know what you think. It was a hastily put together idea so there could be some chinks to work out.

An alternate solution would be to have the ability to sort the drop down lists by % instead of alphabetical, so you're feeding and amusing the more needy lions first without needing to scroll. But still, it's not super necessary, it'd be more of a convenience thing. Reserving my support for now. (suggested by Tortuga)