There's going to be a purge... of your likes.
Facebook is preparing to take some of your page likes. More accurately they're starting a process to cut off certain kinds of accounts, resulting in a loss of likes. This includes profiles which have been memorialised after a user has passed away so they won't show up as fans of pages any more. The company is also set to get rid of likes which stem from accounts that have been manually deactivated from the service.
What this really means is that you may see a dip in the numbers following your page in the coming weeks, but its not down to a Facebook error or because you posted too many cat videos. Although the feline focus could also be a contributing factor. It's just a cleanup process, and in these case of these two specific kinds of accounts, something which should probably already happen automatically when one is memorialised or deactivated.
Facebook has decided not to target inactive accounts which haven't been used in years this time, so it's likely most people won't see much change at all in their follower numbers. Seriously though, there's such a thing as too many cat videos.