Hi Brookes,
Can you please file a ticket (support page https://kittycats.ws/support/index.php?/ticket/submit-ticket )
for the cat that is not loading, if you can't figure out its ID#, please create a folder renamed with your name,
put the cat in it and send it to Kitten Longmeadow.
If the cat is no trans, leave it rezzed inworld where Kitten Longmeadow can go to check on it, don't forget
to add the SLURL to your ticket.
Messages about the "food being outdated" are a problem with the cat not the food, so that should get solved
after Kitten has fixed your cat.
Kitty