Cat attacking
Cats are tameable mobs added by the Mo' Creatures mod. Wild cats will run from the player, but will stop if thrown raw fish to eat. If you run around with a bunny on your head, it should follow you.
Taming
You can tame a cat by right-clicking it with a Medallion equipped. It may be easier if they are first fed raw fish. Once tamed, you can name them. The name and health bar can be toggled on/off individually by right clicking while holding a pickaxe or globally by using the in-game mod menu.
Care and Husbandry
Once the cat is tamed, it will look for a Kitty Bed with food or milk.
You can place beds and litter boxes by right clicking, and pick them up by right clicking while holding a pickaxe.
You can transport a kitty bed or litter box on your head by right clicking on it without holding a pickaxe. You can transport kitties that are on lying on the bed or litter box in this manner. The kitties will want either milk or pet food poured into the kitty bed. While the cat is eating or drinking, you can see the milk/food level shrinking.
Once the kitty has eaten, it will look for an unused litter box.
The litter box will become "used". This item is a powerful magnet for monsters, however, attracted ogres won't stomp and creepers won't explode. Zombies will chase and push it whereas skeletons will fire arrows at it. You may want to place it in a dark area and create a mob trap. After a while, a used litter box will return to its empty state. You can also right-click with sand on a used litter box to clean it.
A cat that has eaten and used a litter box will roam freely. It can become hungry again and look for food in a kitty bed, fall asleep at night, or try to climb a tree.
If you use a whip on nearby cats, they will sit and not move. You can also right click on a cat with a whip to individually toggle sitting on/off.
If the cat has decided to climb a tree, you can watch it climbing. A cat that climbs a tree will get trapped on top and will need help to come down.
You can pick up a cat in three different ways: if it is a kitten, it will ride on top of your head. An adult cat will go on the player's shoulders. If you pick up a cat while holding a rope, you will carry it by its legs. Cats don't like to be carried that way and will be annoyed once you drop them.
Cats can also get annoyed if they don't find a litter box or a bed with food or milk, or if you attack them once they're tamed.
Once the cat is annoyed, it will chase the player and occasionally hurt him/her. After a while the cat will calm down.
A cat will follow you if you have a wool ball in your hand.
If you give the cat the wool ball, it will play with it for a while chasing it and pushing it, until the cat gets bored.
You can breed cats by giving them cake. Once cake is given, the cat will look for another cat that has also been given cake. After a while one of them will become pregnant and will need to find a kitty bed.
After a short while in the kitty bed, the cat will give birth to 1-3 kittens. Kittens will be very playful and will chase any items (not only wool balls), will play with the player, and will chase their/it's mother.
If a kitten is attacked, its mom will defend them.
Cats will display emoticons to give you clues of what they're thinking. You can turn emoticons off using the in-game mod menu.