A cat might throw a ruckus while entering a cat holder which happens to be entirely new territory. It is okay for your little buddy to do so, though; sometimes, they can get aggressive while letting their guard down. They might even experience a defense mechanism and give you a rough time while getting them inside the cat carry box. The easiest way to deal with this situation is to familiarize your little buddy with the new environment or get them the best cat carrier for large cats and make them feel safer. Apart from getting the best cat carrier for difficult cats, you can also get an extra-large cat carrier to place their favorite toys, treats, towel, kibble, or even a catnip in your little buddy's favorite corner make it feel like home. Keep replenishing the supply at regular intervals.