Stephen Colbert welcomed the Acro-Cats to The Late Show, a cat circus that has lots of equipment and cats but very few cats using the equipment for tricks. It's a noble effort, but no one was surprised that a bunch of so-called specially trained cats didn't perform because they didn't feel like it. That's classic cat!

Generally, cats call the shots and tell humans when they want attention. Or they accidentally do tricks because they curiously crawled into a tight space. The appearance of the Acro-Cats on the show was booked prior to the attacks in Paris that have dominated the news. Colbert acknowledged that it might seem odd given the events of the past week:

Sources: The Late Show with Stephen Colbert