Very slowly and at short intervals.
This is always uncertain. I have an older cat and then got a kitten, the older cat really doesn't like the younger one but they live together. There is some expert help all over the web on how to do this, but if not go to your local vet and they can suggest something.
Your 4-month-old kitten may be trying to nurse because it is seeking comfort and security, similar to how a human baby might suck their thumb. This behavior is normal for young kittens and usually decreases as they get older.
An older cat may pin down a kitten to establish dominance or discipline the kitten for inappropriate behavior. This behavior is a way for the older cat to assert its authority and teach the kitten proper social boundaries.
Your 3-month-old kitten may still try to nurse because it is a natural instinct for young animals to seek comfort and security from suckling. This behavior is common in kittens who were weaned too early or who have a strong bond with their mother. It is important to provide your kitten with appropriate sources of comfort and stimulation to help discourage this behavior as they grow older.
I myself, being the owner of many cats, can tell you this. Your cat may or may not accept your new kitten. The only thing you can do is just introduce them slowly, don't force anything onto your older cat that it doesn't want. The older cat will at first hiss, cuff, or growl at your new kitten, but in time he'll learn to tolerate the newcomer. He just needs to learn that the kitten isn't there to take his place, make sure you're still giving your older cat the attention that he wants and show him that even though you have another cat, you still love him just as much.
An older cat.
It is important to prevent an older cat from eating kitten food because kitten food is specially formulated to meet the high nutritional needs of growing kittens. Older cats have different nutritional requirements, and eating kitten food can lead to obesity and other health issues in the long run.
Cats are not pack animals, they only tolerate each other in our homes because we feed them. You older cat sees the kitten as invading it territory.
At 6 months old, your kitten may still try to nurse out of comfort or habit. This behavior is common in young cats and usually decreases as they get older. It is important to gently discourage this behavior to prevent any potential issues.
You can't tell if they will be fluffy or not. As the kitten gets older it will get easier to tell if the kitten is longhaired or shorthaired, but in very young kittens it is very difficult to tell.
Well, it seems you might have already messed up the introductions.The first step should always be setting up a separate room for the kitten, where they can explore their new world without getting into too much trouble, and, here's the benefit for your older cat: You let the older cat get curious about the kitten, and WANT to make their acquaintance.If you just came home and dumped a new cat into the middle of what the older cat thinks of as their home, you've created a little intruder. Cats don't like intruders.It might not be too late to separate the two cats and start over. This will give the older cat some breathing room to sort out how they would like to react.Generally kittens can melt the older cat's heart, but there are some circumstances that can cause difficulties:* The cat is too old for the play appeal to take hold. Cats vary, of course, but once a cat reaches double digits, they might be more interested in refining their nap technique than to be chased all over the house by some young whippersnapper. * The cat is not social. Some cats are simply not cat oriented. If your older cat is shy or not playful, they will find a kitten's overtures to be annoying when they want to be left alone. * The cat has a deprived background. A kitten can stir up all kinds of difficulties, from flashing them back to bad times to bringing up the hidden truth that they are not very skilled at inter-cat communications. They will find themselves unable to establish good cat relations if they do not understand the signals.No matter what the cat's problem might be, starting introductions over is a good first step. Make a fuss over checking on the kitten when you go in there to play with the kitten, and come out to let the older cat smell the kitten's scent while they get a treat. When the older cat hangs out at the door and sneaks around to see you go in and out, the older cat is letting their curiosity overcome their annoyance. Don't rush this process. Have the older cat hankering to see the kitten.Try to make good things happen when the kitten is around, from treats to toys. Point out the tremendous advantages to your older cat of having their own kitten. Pretend they asked you to get a kitten.And be honest; how much of this is your own fault? Have you fussed over the kitten and neglected the older cat? Have you changed beloved routines for the kitten? Do you laugh at something the kitten does that the older cat isn't allowed to do?Give the older cat a reason to like the kitten, not a reason to resent them.
if it is still a newborn then it's normal. some little kittens don't have a voice at first. But if it is older like in the 5 month stage or 3 month stage then get it to a vet it could have a rare sickness that causes them to not be able to speak at all! i hope this was useful info.