Look at the kitten's eyes, if it is blue then it means it is still in a very young age. If the kitten is blind or has trouble opening its eyes..look at the kitten's teeth. See if the kitten is able to eat on its own..if it can't, thats means it needs to be fed.
Every cat may secretly (or openly) wish to be an only pet, getting all the treats and attention you can dole out. But two cats can learn to cohabit, if you provide the right environment for your resident cat to accept a roommate. While cats' preferences are highly individual, some breeds, such as Persians, Maine Coons, ragdolls and Birmans tend to be more easygoing, adaptable and gentle, and may more readily accept a feline friend. To safeguard the health of both cats, have the new cat examined and vaccinated by a vet, particularly if he is a stray, to ensure he has no parasites, upper respiratory infections or other health issues. With the right precautions in place, all you have to do now is persuade the kitties that life is better with two.