I am wondering if in fact the felines have taken over the world to arrange that their slaves are on hand 24/7...
In a cruel twist those slaves and potential slaves that are allergic to them are least likely to still be around to carry on duties 
They have taken their world domination too far, I am not convinced our urgent order of specialist cat food will make it to us in time!!! Again could it to be ensure it's tinned tuna and cooked pure meat all the way...