My idea is to change food from having a certain amount of uses to just having a percentage bar. It's annoying having to feed a lioness twice off the same zebra when she could eat her fill in one go.
One use of a zebra feeds your lion 60%. A zebra carcass has 6 uses, so the carcass would have 360% meat remaining when unused.
So say you have a lioness at 80% hunger. You click 'feed' and your lions hunger goes down by 80%, and the zebra's meat percentage bar goes down to 280%.
This would save time because you don't have to feed the lioness twice off a carcass when it could have filled her the first time. I know all the clicking involved annoys me lol. When the carcass reaches 0% it disappears.

There could be an option to switch between feeding systems and the default option would be food uses so new players are not caught off guard before they learn how much hunger satisfaction each carcass provides.

Or you can type in the percentage of food you wish your lioness to consume. This would prevent running out of prey before all your lions had the chance to feed.

Edit:
As Paige said, This could also help for when you have lionesses that only need to be fed a little bit, but all you have are large carcasses & you really don't want to waste the 60% feeding capacity on the lioness when they only need 20%, but you have to because that's the only way it goes.