She can feed herself, but you'll have to make sure she has access to fresh water, same as you would for yourself, or a dog. Salt water doesn't do any of us any good.

[She glances down at Pumpkin and thinks for a second. Pulls Thickrump into her arms to point at his toebeans. Let's see if he takes the bait....]

Since she's a hunting cat, you don't need to trim her claws, but you should still check them for injuries now and then. Cats are proud creatures--they'll hide when they're in pain, so you have to check like this now and then.