Experienced and professional animal trainer provide their insights in answering this question :
A. Excessive grooming, lack of appetite, depression, aggression, and inappropriate spraying on the walls or outside the litter box are all different ways your kitten may act out when she is stressed. Depending on the severity of the stress, you may want to contact your veterinarian or a behaviorist.

How to Identify Common Pet Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced pet care professionals :

If your kitten crouches low to the ground, with a tense body and dilated pupils, they may be feeling anxious. If so, they may also pant, and lick themselves more than usual. If your usually placid and affectionate kitten starts to bite and scratch, they may be bored.
It`s normal for your cat to feel stressed from time to time. It helps them stay safe – like running or hiding from something they find scary. But too much stress can lead to longer term problems with your cat`s mental and physical health. Spotting the signs of stress is also more difficult in cats.
Kittens especially, much like children, can suffer from feelings of anxiousness and stress that can stem from a variety of sources. Common causes of anxiety in cats include trauma or illness, a litter box that is dirty or not `private`, a safe sleeping spot, and even bullying by other cats if you have more than one.
You might think that your cat is content because he or she is purring, but even purring can be a sign of stress in cats.
When frightened, some cats may hide, try to appear smaller, pull their ears back and be immobile. Other cats may show signs of agitation or aggression, such as dilated pupils, arched back, pilo-erection (hair standing on end), and hissing.
Provide them with some toys, maybe filled with food or treats. These will keep your kitten entertained and help them relax. Leave the radio or TV on as a distraction. If possible, having another kitten as a playmate can alleviate their boredom as well as teach your kitten valuable social lessons.
Signs of a Depressed Cat

The following are some classic signs of depression in cats: Loss of appetite or changes in feeding habits. Changes in body language, including ears held back, tucked tail, and hairs standing on end. Meowing more or less than usual or making low-pitched, mournful meows.

Fear, stress, pain, or anxiety can also lead cats to meow. Repeated meows can be a cat`s way to let you know they are under stress due to pain or because they are scared or anxious due to a person or animal in the house.
Reduced appetite. Lethargy. Decreased interest in positive things like playing, social interaction and exploring outside. Being withdrawn and hiding away.
Changes in litter box habits

A stressed cat may exhibit changes in their urination or defecation habits. Loose stool or diarrhea can be a symptom of stress or a variety of illnesses. Occasionally, cats will urinate or defecate outside the litter box or in inappropriate locations if they are stressed, painful, or sick.

Cats can suffer from tummy issues and poop problems if they are depressed or anxious, which can happen to any cat for a variety of reasons. For example, separation anxiety, changes in routine, a new baby or pet in the home, or not getting enough interaction can all be causes for a deeply saddened or stressed out kitty.
From a young age a cat`s mother would not only lick them as a way of grooming them, but also to show affection. Cats then replicate this behaviour with you as a way of showing their own affection – it simply comes naturally. This licking behaviour is not just exclusive between pet and owner.
A cat that purrs and meows at the same time may be actively trying to get your attention for some reason — usually for food. Cats that are engaging in this type of communication usually act expectant and demanding and may head butt you or actively rub their body on you.
Place some food treats near where you`re sitting, or put a bit of food on your finger, to try to entice her to approach you. If she approaches, allow her to lick the food off your finger. Resist the urge to reach out to pet or pick her up. This will scare her, which will only cause her to run and hide.
Kittens younger than four months of age should not be left alone for more than a couple of hours. Over four months, they can handle up to five hours. When they turn six months, they should be able to handle your 8-hour workday. Keep in mind that each cat is unique.
Yes, cats do get lonely. Even though they are extremely independent creatures, they can feel sad and lonely while their owners are away and they are left home alone during the day or over a vacation. They may not show it much, but they do, and just because they don`t seem to be lonely, it doesn`t mean they aren`t.
As a general rule, cats are sensitive when it comes to smells, but there are a few scents they hate that might just surprise you. They can`t stand citrus and as much as you might love the smell of fresh herbs, cats hate rosemary and thyme. Banana and mustard are a big no-no too, as well as lavender and eucalyptus.
Commonly used herbs for relaxation include chamomile, hops, valerian, skullcap, and passionflower. Valerian acts a bit like catnip, so don`t be surprised if it`s somewhat stimulating in the first 30 minutes; however, the relaxing benefits will soon kick in and can last for several hours.
The good news is that most kittens calm down with age. Cats develop much quicker than their hooman families so you can expect your kitten to slow down at around 9-14 months as they advance into adulthood.
Cats are emotional and can get stressed or depressed. The most common signs of an unhappy cat are cowering, hissing, and fleeing. But sometimes your cat may not show obvious signs of stress. This is why as a pet owner you should have knowledge of how cats behave when they`re depressed.
Cats can become sad or depressed due to various reasons. Some common causes of cat discontentment include illness, boredom, grieving of a lost family member or pet that they were bonded with, or injury.
In conclusion, when your cat meows at night, you must ignore it completely and perfectly in order not to encourage the behaviour. Keeping the cat busy at night may prevent it from getting hungry or finding creative ways of getting your attention.
Cats that are ill will usually show changes in overall appearance, energy level, sociability, coat appearance and/or amount of shedding, appetite, litterbox usage, breathing, or discharges from the eyes or nose. In general, any sudden change should alert you that your cat needs veterinary attention.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. i believe my cat is pregnant but showing signs of being in heat
ANSWER : A. Cats are induced ovulators, meaning they will continue to go into heat until they are bred, or spayed (reproductive organs removed). If your cat is showing signs of being in heat (excessive yowling, presenting her rear to you for inspection, attempting to get out or other cats hanging near your house) and you don’t want kittens, it is best to have her spayed. Most cats are also semi-seasonal in their heat cycle meaning they will more likely be in heat through Spring-Summer than in Fall-Winter.

Pregnancy in cats lasts about 60 days. Signs of pregnancy may include weight gain, increased appetite, nipples that become pronounced or “leak” and seeking nesting areas to deliver kittens. If you saw that your cat was in heat, or had her mated, you can use the date she was bred to determine when she may be due for kittens. Your local vet can help determine if she is indeed pregnant and can also take an X-ray to determine the number of kittens present if your cat is nearing her due date. Be sure to feed mom a kitten formula in the last few weeks of her pregnancy and during nursing as it will help provide extra beneficial nutrients for both mom and babies.

If you do not want kittens, some very early term pregnancies can be aborted with spaying, otherwise spaying mom is usually done when kittens are weaned from their mom.

Q. We brought 2 new kittens home. One of them is sneezing. We have a Sr cat and an adult who is now coughing. What to do?
ANSWER : A. Commonly respiratory infections (viral -Herpesvirus and Calicivirus- and possibly bacterial) can cause sneezing episodes in kitten especially if not vaccinated yet. If your kitten is affected by respiratory infection could develop or have more signs such as discharge from eyes, more discharge from nose, coughing, being lethargic, depressed and inappetent.

The coughing episodes of the adult cat could be completely unrelated to the cause of sneezing of your new kitten, especially if your adult cat is already vaccinated.

The cause of cough in adult cats are not necessarily related to respiratory problems, heart problems could cause that as well.

Keep the nose and the eyes of your kitten free from discharge, keep your kitten warm and take both of them to your veterinarian as soon as possible to identify the cause and the relationship of the two problems and treat appropriately.

Q. My kitten had got fixed on 12-7-2015 and after a few days she was ok she was eating and playing with my other kitten and she just started vomiting.
ANSWER : A. It is possible your kitten may have over exerted herself while she is still healing, or may have an infection forming from her suture site. It is best to look over her spay suture and look for any signs of infection such as redness or heat upon touch, pain, or oozing of green or yellow discharge. If you see these signs, it is best to contact your veterinarian to have the area examined. If she has only vomited once, and you see no other signs of illness, then feeding a bland meal of plain boiled chicken lightly warmed up may help settle a minorly upset stomach. However, if the vomiting continues for more than a day, or she shows other signs of being ill, then it is best to bring her into your vet.

Q. I have a 1yr old male 38 lb Labradoodle and my gf just brought a month old kitten home. Can they interact? If not, for how long?
ANSWER : A. Interactions whenever a new pet is brought into the house should start off slow, then can be increased in time. The best steps when introducing a new cat is to allow your cat or kitten to have a room in the house all to him or herself. Allow your dog to sniff under the door to get used to the kitten’s scent, and even show your dog articles such as bedding the cat has slept on. After a few days, an introduction with your dog on leash, or a barrier such as a gate where both pets can look at each other but not see each other is best. This will allow each to get used to seeing the other without the ability to jump, bite or scratch the other. Once the two are used to this, then a face to face interaction can begin. If at any time a fight or scuffle breaks out, separate the two pets and try again at a later time. The amount of time this introduction takes can vary depending on how the two react to each other.

Until your kitten is older, or you are sure both are fine together, do not leave the two pets together unattended. Even a well-meaning and playful dog can accidentally break a leg of a kitten or worse without meaning to! A safe room for your kitten to be in while you are away, or a barrier to allow your kitten to escape to safety if needed will help until both are big enough to play alone safely.

Read Full Q/A … : Dogs and Jealousy

Q. I recently added a new 2 month old female kitten to my house and my male 5 month the old kitten has turned aggressive and chases the kitten down..
ANSWER : A. It is possible it could be play behavior but without seeing it in person, hard to say. Is the male kitten neutered? You may want to consider doing so. Also, try re-introducing the kittens slowly by creating a safe space for the new kitten behind a closed door in a room. Keep her there for at least a week so she is protected but your male is still able to smell her. After a week or 2, you can then graduate to using a baby gate so they can then not only smell each other but safely see each other as well. If that is going okay, after another few days you can bring the gate down. Also, be sure to have feeding bowls in separate locations and at least 2 litter boxes.

Read Full Q/A … : Ragdoll Cats

Q. What are some signs of stress in kittens?
ANSWER : A. Excessive grooming, lack of appetite, depression, aggression, and inappropriate spraying on the walls or outside the litter box are all different ways your kitten may act out when she is stressed. Depending on the severity of the stress, you may want to contact your veterinarian or a behaviorist.

Read Full Q/A … : Cat Behavior

Q. What type of symptoms are there if after a couple days the mother car has if there is a kitten still in the womb???
ANSWER : A. You will see signs of stress, probably a fever and diarrhea. She may not pay any attention to the kittens she has. Remember that it takes time for the abdomen to return to a normal size after a delivery, so if a large abdomen is making you think she still has a kitten inside, she probably doesn’t. If she is showing any sign of distress, though, bring her to the vet right away.

Q. I have two 3 week old kittens that I am bottle feeding. The kittens both have diareaa and there buts are red. Is there anything I can do ?
ANSWER : A. Diarrhea in kittens can be caused by many things, including intestinal parasites (very common in kittens), wrong formula, recent changes in diet (from queen’s milk to formula or from one formula to another), and other gastrointestinal upsets. Their bottoms are likely red and irritated from the diarrhea soiling the fur and skin, trapping moisture against the skin and serving as a breeding ground for bacteria. First, stop feeding the formula. Second, collect a fecal sample to be analyzed by your veterinarian for intestinal parasites. Third, call your vet and make an appointment as soon as possible, ideally the same day. Diarrhea in kittens is serious business and can lead to death from dehydration and loss of nutrients. Finally, in place of formula give an electrolyte replacement solution (like Pedialyte for infants/children) – plain, no flavors, no colors – for at least the next 1-2 feedings. This is not the same as a sports drink. After the 1st or 2nd feeding of straight electrolyte replacement solution, start to add formula back into diet at 1/4 strength ( 1 part formula to 3 parts water), The following feeding mix 2 parts formula to 2 parts water. Then, 3 parts formula to 1 part water. Finally, offer full-strength formula. If the diarrhea continues or worsens with increasing amounts of formula, go back to just electrolyte solution and repeat the process.